5.5(top 5%)
impact factor
465(top 50%)
papers
2.1K(top 50%)
citations
19(top 50%)
h-index
6.6(top 5%)
extended IF
504
all documents
2.8K
doc citations
30(top 50%)
g-index

Top Authors (by articles)

#AuthorArticlesCitationsR ARankR CRank
1Michael Meyer-Hermann3511021
1Yuan Liu384214
3Camille Ferdenzi210224
3Robin N Thompson215726
3Jeffrey V Lazarus293269
3Azra C Ghani2642743
3Po-Hsuan Cameron Chen27729
3Craig H Mermel277722
3Carey-Ann D Burnham2301544
3Peter Regitnig27748
3Matthias S Matter210546
3Moustafa Bensafi2101346
3Youqing Mu24211
3John Gallon21017
3Caner Ercan21019
3Markus H Heim2101474
3Clinton J V Campbell24229
3Luigi Maria Terracciano21043152
3Gautam Dantas2301647
3Mauricio L Nogueira2432135
3Guilherme Rodrigues Fernandes Campos24311
3Sebastian C Binder23627
3Oliver John Watson264416
3Salvatore Piscuoglio2101554
3Peter Winskill264514
26Gil Serrancoli Masferrer16110
26Paul A Friedman, Fhrs142761
26Patricia Barros1529
26Cecilia Artico Banho13222
26Sarah E Piombo1014
26Pietro Mascheroni11512
26Rahil Sachak-Patwa11222
26AnhNguyet Diep112211
26Teck-Hua Ho1131230
26Gernot Ernst11048
26Niccolò Bonacchi11015
26Chung Yan Grace Lui121645
26Hynek Pikhart1102779
26Kurt Zatloukal1241633
26Daniel G Pellicci131222
26Kai Ming Chow123773
26Sanjam S Sawhney1913
26Kazushige Nakahara1425
26Maryellen Lissak Giger111961
26Hamid R Tizhoosh161732
26Krzysztof Gogolewski13212
26Alberto Mantovani111148292
26Pablo Martinez-lozano Sinues1161834
26Roberto André Kraenkel167167
26Barbara I Nicholl1211931
26Susanna J Dunachie132050
26Ed J Kuijper1456136
26Diego García-Gómez1161120
26Shouichi Ohga144179
26Dorothee von Laer1361013
26Hanno Ulmer13692123
26Seiichi Morokuma1427
26Jonathan P Reid1162650
26Masafumi Sanefuji141233
26Eliisa Kekäläinen15630
26Chew Yee Ngan1131530
26Paul V Licciardi131032
26Stanley Kimbeng Mbandi115312
26Caroline Lustenberger122516
26Rachel N Cusatis15512
26Fabrice Bureau112822
26Abhay Bangalore Ramachandra118510
26Lisa Smith13414
26Pedro Pechirra1569
26Samuel Hong15315
26Xin Xu1242129
26Hannes Stockinger1192957
26Sharon Yim1524
26Alexandra Nunes151227
26Graham S Cooke1133262
26Seunghyeon Kim12335
26Jenni M E Virtanen15210
26Tina Hernandez-Boussard183583
26Michael V Holmes162766
26Debashis Ghosh1352220
26André Labbé1162536
26Josefa Carrion-Navarro128913
26Lars Ittner1143476
26Chia-Lin Wei1131329
26Henry E Symons11625
26Jean M Lewis14923
26Alisdair R Macleod1627
26Hira Ahmad11843
26Lisa Pipperger13611
26Tomáš Pavlík110211
26Lucy C Okell1281422
26Busiku Hamainza1218
26Líbia Zé-Zé151133
26Ernesto Crisafulli1182128
26Melanie Neeland131024
26Cássia F Estofolete132810
26Leonid N Valentovich1736
26Charles Tator1212
26Bhautesh Dinesh Jani1211020
26Jean Shin16825
26Steffen Massberg1123257
26Bryon D Johnson15825
26Naomi R Wray1155493
26Keith Durkin112415
26Ilka Engelmann116818
26Andrew J Fiore-Gartland115717
26Heather I Greenwood11412
26Jacome Bruges Armas15715
26William J Muller11936
26Silas Poloni16711
26Vera Manageiro151633
26Ludwig Knabl13621
26Christen Bertel Lykkegaard Andersen121233
26Ara Darzi113142241
26Hussein Alburkat1512
26Kazushige Touhara1101232
26Stefan Feuerriegel1107174
26Steven Riley1282736
26Zachary F Mainen1101321
26Jeroen A W M Van Der Laak183375
26Wegene Borena13678
26Hiroshi Iwakura191829
26Helen Ward1132447
26Jared M Baeten144169
26Hao-Ting Chang1235
26Kristy R Crooks13516
26Christina J Atchison113919
26Trystan Leng1337
26Lothar Hennighausen1185187
26Patricia Kovatch12314
26Paul J Norman1351928
26Matthew G Wiet11812
26Caroline Franco16711
26Robert Reihs12446
26Anders Holst1010
26Walter Karlen1221119
26Gabriel Fridolin Hess1512
26Lawrence N Shulman1182228
26Kirk I Erickson1193371
26Michael V Mcconnell172351
26Tiong Kit Tan13624
26Thomas Wolfgruber1115
26Karla Kerlikowske112646
26Christophe Breuer11211
26Ian B Hickie Am11582128
26Moritz Kraemer152047
26Elena Petelos13273
26Bruce Pike1639101
26Anna L Marsland1192046
26Daniel Helldén1114
26Christopher James Carswell11213
26Riccardo Levi11114
26Matthew C Kiernan1144483
26Claude Saegerman1124463
26Wanding Zhou1351220
26Heli Harvala131530
26Simon Cauchemez1212543
26Saurabh Sihag1215
26Celeste M Donato13820
26Prashant U Pandey12024
26Ingfrid S Haldorsen1201627
26Bonnie N Joe111524
26Andrea Vambutas16911
26Iris N Kalka1116
26Dung Van Nguyen13513
26Gustav Stålhammar1151014
26Elaine W Butterly12113
26Robert Daulton11811
26Vojtech Thon11011
26Jason M Szafron11837
26Henrique Helfer Hoeltgebaum12823
26Jailos Lubinda12215
26Jeffrey West12649
26Torsten Tonn151136
26Keir E J Philip116414
26Yftach Gepner119915
26Olga Kostopoulou112717
26Xiao-Ming Wang11659
26Konstantinos Arfanakis1122147
26Thomas Hummel11083186
26Lívia Sacchetto13247
26Chih-Da Wu121237
26Christopher R Gignoux1351622
26Mette Klarskov Andersen12920
26Frances Mair1213758
26Temitope Oyedele1413
26Louise Dyson112921
26Marc A Suchard1537106
26Jill A Gallaher12657
26Namrata Grampurohit13414
26Carsten U Niemann121634
26Behzad Iravani11037
26Fan Zhou13718
26Ilaria Dorigatti1281822
26Thomas R Kreil11977
26Kaia Palm11421
26Long T Nguyen12413
26Henrik Zetterberg12155329
26Fábio Possebon13251
26Philip K Maini1263964
26Camilla Krakstad1202241
26Heidi Espedal12036
26Line Bjørge1202344
26Jacob C Zbinden11847
26Zheng Quan Toh13315
26Simon B Gane11937
26Li Wen11115
26Simon Papillon-Cavanagh11412
26Vadim N Gladyshev1192956
26Gianlucca Zuin1611
26Ramkumar Krishnamurthy118514
26Arun R Sridhar1437
26Thomas J Scriba1154263
26Ezekiel Ayotomiwa Adeniyi1713
26Laura Di Domenico12115
26Amit Bansal1314
26Nikos Vasilakis1322732
26Scott H Fraundorf11969
26Reiko J Tanaka1131020
26Joanna Jasińska11937
26Natalie A Watson11633
26Eleanor Barnes1342112
26Monique M Courtade-Saidi10415
26Samir Bhatt1282335
26Yamir Moreno193154
26Norio Hamada1426
26Jose Muñoz Gutierrez171636
26Derek Abbott11270113
26Yaxin Bi12421
26Tõnis Timmusk112051
26James Beeson1123767
26Laurent Gillet112927
26Yichen Zhang16911
26Alexandar Tzankov1563126
26 Dan Yamin119712
26Neil Ferguson1284561
26Maria Amélia de Sousa Mascena Veras16764
26Alberto Aleta19713
26Amy Chang11712
26Haralambos Hatzikirou115826
26Conor K Corbin11712
26Ursula Wiedermann1192540
26Wenzhong Shi1113258
26Ewa Szczurek1321011
26Reto Huber1223261
26Yazi D Ke1141124
26Justin Chan1516
26Bernt Johan von Scholten121432
26Timothy V Pyrkov11924
26Sabine Szunerits11664104
26Rupert Kaul163167
26Debmalya Nandy13521
26Scott M Lippman1491623
26Andreia V Faria1241625
26Hege F Berg12033
26Eng-Kiong Yeoh122175
26Kejun Ying11912
26Christian Brieghel12613
26Sandro Nuciforo1548
26Richard A Wennberg121438
26Adam Penn-Nicholson1151626
26Kaj Blennow12125259
26Paresh A Malhotra1121422
26Guy Baele151742
26Humphrey Mulenga11558
26Harald S Haugen1426
26Alberto García-Basteiro172137
26Cíntia Bittar13287
26Alison P Galvani1132741
26Nídia Sequeira Trovão15920
26Vittoria Colizza1212542
26Tomi W Jun123413
26Kari Christine Nadeau1750105
26Donato Zipeto1181227
26Alexandre N Datta116819
26Daniela S Silva1513
26Jose Luis Calleja-Panero123161
26Rasika A Mathias1352024
26Takehiro Michikawa142755
26Carlo Menon1122954
26Eeva Sliz16210
26Tobias Alfvén111035
26Maria R Farcet11933
26Lien Anh Ha Do13325
26Cornelia C C H Wielders14916
26David Devos1163169
26Donal T Skelly13516
26Silvia S Longoni11867
26Rabab Kreidieh Ward1123357
26Haonan Lu11247
26William S James132569
26Alexander A R A Anderson1262947
26Nitzan Shalom Artzi1114
26João Paulo Gomes151651
26Michael Kundi1193769
26Annika Rähni1124
26Renato Mendes Coutinho16743
26David P Kao1351423
26P Ashley Wackym, Facs, Faap169176
26Lambert T Leong1112
26Christopher Dye15415
26Angelika Wagner11946
26Joaquín Sanz19316
26Natalia Tiberti118614
26Edward M Hill13615
26Dong-Wha Kang1241924
26Kathleen C Barnes1351020
26Christine Johnston141744
26Matjaz Perc1324662
26Katie Bates13631
26Marius Distler151236
26Noam Sobel1101427
26Kristin G I Mohn13513
26Helena L Ferreira1321712
26Simon Rauch118812
26Foad Taghdiri12216
26Thomas Czypionka132813
26Felipe Santos16967
26Lundstrom, Jn1102147
26Ofer Perl110311
26Martin Osswald11614
26Alain Rm Townsend132552
26Jone Trovik1202032
26James Lewsey121915
26Penelope A Lind1152043
26Robert Verity1281221
26Wendy Barclay1132755
26Chengyuan Wu131637
26Chiara Poletto1211124
26Simon Carl Mendelsohn11568
26Steve Horvath13556100
26Nisreen A Alwan1291521
26Mauricio Santillana1161327
26Pablo Ryan122148
26Moreica B Pabbruwe1858
26Gavin J Churchyard1152544
26Peter A Noseworthy143674
26Kevin Kelly11334
26Franklin Santiago Mariño Sánchez110515
26Nirav N Shah151433
26Jonathan H Chen1171123
26Aaruni11514
26Huai-Yu Tian15624
26Christine E Kelly11924
26Denise Naniche172138
26Aimee K Armstrong1181011
26Stefan Wagenpfeil161765
26Masanobu Ogawa14515
26Isabel Lopes de Carvalho15515
26Woojin Scott Kim114818
26Stephanie E Lindsey11814
26Phuoc Truong Nguyen1525
26Olivia Yau12013
26Valérian Turbé11315
26John S Ji122446
26Charlie Whittaker1281120
26Emad A Rakha1533648
26Lee A Albacker111132
26Esther Werth1221533
26Juliette Paireau121514
26Nancy Sarah Yacovzada1123
26Otavio Canton16711
26Toshiharu Shinoka1181642
26Sara Spinelli110712
26Argye E Hillis1243141
26Janine Kimpel1361016
26Stefan R Bornstein1561142
26Laura R Marks19914
26Pierre-Yves Boëlle1213172
26Anne-Françoise Donneau11249
26Stefan K Plontke161121
26Chengzhuo Tong11113
26Benjamin M Althouse1321225
26Kuan-lin Huang1231016
26Hagai Rossman11310
26Kapil Dev Singh11645
26Chiara Piubelli1181223
26Caterina Dinnella1101527
26Marcelo Borges16711
26Peter Hanlon121919
26Ranran Zhai11913
26John M Kelly11826
26Elin Strand12035
26Maria C Tartaglia122761
26Charlotte K Y Ng153156
26Lukas L Imbach1161123
26Thomas W Kamarck1191121
26Sonia Villapol Salgado17840
26Daniela Olivera Mesa13612
26Andrew A Monte1351420
26Yoojin Choi1613
26Zhigang Li17727
26Magdalena Rosińska132913
26Alexandra B Hogan13637
26Dong Hyun Jo161345
26Margaret R Karagas174584
26Chen Li1517
26Maria Carolina Tostes Pintão1612
26Maria Rescigno1113682
26Marwan Fakih152971
26Reut Weissgross11013
26Yitang Sun11717
26Tim Becker1121522
26Louis Richer161333
26Miguel M Pinheiro15320
26Anna Bershteyn141028
26Rahul Mannan116614
26William J Browne1162651
26Xueqian Xie19517
26Olivier Piguet1144969
26Sudeep Gupta1182930
26Andreas Holzinger1244178
26Nickie Andescavage11867
26Eran Segal112869
26Michael J Tildesley131831
26Yasubumi Sakakibara191120
26Rohit Mehra1163141
26Kerstin Noëlle Vokinger110753
26Jean Coquet1834
26Margaret Barlet12112
26Claudia C Branco15815
26Paulo Inácio Prado1671712
26Jan Ekman1010
26John Allen1121332
26Xiaohong Gao12337
26Brian A Boe11876
26Anastasia V Shindyapina11946
26Peter Sadowski11516
26Veronica Pereda-Loth1013
26Shannon D Donofry119510
26Ubydul Haque121336
26Alexander Greninger143381
26Jürgen Geisel16516
26Paul Elliott11370133
26Thomas Wiebe10713
26Johannes Henricus Francisca Maria Pinckaers18110
26Sonia Alonso López1226
26Harinderjit S. Gill162844
26Alexandre De Figueiredo14247
26Zdenka Pausova162659
26Hye Kyung Lee11877
26Sara Mariotto1181223
26Bernard Cazelles152557
26Michele D Tameris1152030
26A Michael Donoghue Dmed11322
26Michael J Ackerman144094
26Manu Airaksinen11334
26Pablo Martínez de Salazar11637
26Aniko Szabo153199
26Zulma M Cucunubá1281420
26Kevin Y Fan12012
26Neal A Chatterjee141325
26David Burgner1350130
26Mark H Wener14629
26Rebecca J Cox131028
26Kevin M Blum11839
26Yue Gu12313
26Peter E Lobie151329
26Heidi J Larson1423233
26Jamie A Cohen13213
26Thomas J Joyce181724
26Joana Isidro15316
26Mattia Marinucci1512
26Sharon Nirenberg12324
26Jenell Stewart14210
26Ladislav Dušek11050104
26Sarah L Aghjayan11912
26Giulia Giordano1321110
26Jose M Martín-Moreno171548
26Swapnil Mishra128714
26Michael L Knight13514
26Oliver G. Pybus155698
26Parameswaran N Hari153673
26Thomas Valente102684
26Shobith Rangappa153361
26Kogieleum L Naidoo1152338
26Rohit Singla12013
26Maria Zambon133173
26Helena M Linge10620
26Han Fu12839
26Gianluigi Dorelli11824
26Luca Di Tommaso152963
26Leonardo Souto Ferreira16721
26Pallav L Shah, Mbbs, Fers, Frcp1162535
26John C Bell1122454
26H Juliette T Unwin128715
26Rajesh Krishnamurthy1181320
26Jennifer M Knight15823
26Erminio Monteleone1101329
26Marianna Inglese11225
26Christopher Michael Orton11636
26Teemu P Smura151736
26Pramila Rijal13926
26Karuna E W Vendrik1412
26Nir Goldstein11923
26Lian Wanmin1128
26Adrian J Moore1218
26Jose Lourenco151536
26Arik Eisenkraft, Mha11955
26Lee Gehrke169516
26I S Curthoys164068
26Rafael Lopes Paixão da Silva16711
26Inmaculada FernÁndez12715
26Massimo Pizzato1181121
26Enda M Byrne1151442
26James D Calder11623
26Mijail D Serruya13414
26Zhen Lu1161233
26Patrick G T Walker1281118
26Ricardo B Leite15420
26Richard D'Aquila11611
26Pedro Augusto Alves111310
26Cecilia J Hillard152057
26Heimo Müller124514
26Zachi I Attia141227
26Sampsa Vanhatalo1132340
26Yuan-Chiao Lu11834
26Alain Roussel1161130
26Weibin Cheng11620
26Shyamnath Gollakota1528
26Jeffrey P Townsend1134078
26Jingqi Zhou11718
26D Bradley Welling,, Facs1691611
26Javier García-Samaniego122946
26Jakob Usemann116914
26Tomasz Stokowy120924
26Kiyoko Kato143065
26Mark Robertson-Tessi126611
26Konstantina M Stankovic1692318
26Nina Langeland131229
26Hilary G Morrison172051
26Sebastien Naze1217
26Justice Archer11645
26Peter O Fedichev119511
26Glenda Halliday11481142
26Juan J Calix1923
26Flavia Maria Darcie Marquitti16748
26Mario Tovar1911
26Serghei Malkov11918
26Marcos López-Hoyos173671
26Sara Good16315
26Johannes N Van Den Anker1163236
26David J Roberts132763
26Gabriel J M Mirhaidari11824
26Erling A Hoivik120310
26Ming Wei Chen12324
26Barbara Ludwig15515
26Carlos Cordon-Cardo1234988
26Quique Bassat174377
26Nicholas J Schork1496891
26Samuel Yeung-Shan Wong1257154
26Lillian Sung1175981
26Stephen M Davis1243745
26Jay D Humphrey1184067
26Nicholas Peckham1613
26Benjamin J Fregly161529
26Maria Teresa Valenti1181737
26David J Langton18622
26Elena Azzolini111326
26Javier Gilbert-Jaramillo13417
26David F Steiner153212
26Kanika Kuwelker1315
26Matthew Whitaker113611
26Chad R Wells113511
26Alice Freitas Versiani13243
26Sarah E. Medland1155787
26Denis Pierron1037
26Martin C Stumpe124920
26Olivera Bozickovic12011
26Michelle Fisher11517
26Shui Shan Lee125191
26Luisa Mota-Vieira151439
26Diedtra Henderson11811
26Seok-jae Lee1614
26Geert Js Litjens181532
26Isabel Gordo151937
26Christophe A H Bousquet10312
26Kanta Subbarao133978
26Catherine Limperopoulos1182429
26Helen Byrne1123063
26Malcolm Kohler1162853
26Mohamed Elgendi1122027
26Pascal Crépey121613
26Torsten Rahne161216
26Alison L Marsden1182748
26Sarah Cuschieri1321716
26Rachel A Mckendry1131131
26Sadiyah Sheikh11627
26Niels Olson15325
26Chiara Pozzi111317
26Måns Nilsson111539
26Aharon Ravia11049
26Rita Macedo1546
26Bryan Bzdek1161124
26Olli Pekka Vapalahti1551108
26John A Shepherd113584
26Artin Arshamian110719
26Ching Leong113610
26Smadar Shilo11520
26Melisa Gumus1224
26Gerhard Walzl1154279
26Hugo F M C M Martiniano15311
26Cliff C Kerr1321218
26Stefan Lohse16722
26Veronique Renault11245
26Frederik Van den Broeck15520
26Emmanuel Faure1161019
26Chelsea M Stillman119721
26Katrina S Pedersen15518
26Philippe Lemey154188
26Srdan Matic11011
26Victoria C Ziesenitz116911
26Jonathan Melamed183872
26Danielle Wurzel13820
26Jeong Hun Kim163273
26Peter R Schofield112108189
26Harold Noël12135
26Geertruida Hendrika de Bock1962122
26Katharina D Hauck1361117
26Amir M. Ghaemmaghami112375
26Beibei Jiang1938
26Erez Shmueli119613
26Erica L Schwarz11812
26Luca Dalle Carbonare1182147
26Souvik Seal13511
26Sigrun Smola161034
26Genelle F Harrison13522
26Camilla Tøndel13823
26Andrew Hopkinson13511
26James R Kozloski12211
26Maya Moshe11315
26Adrián I Campos115714
26Anna Gambin1321618
26Anna Wald144895
26Mark Hatherill1152038
26Bo Håkansson161428
26Ashish M Kamat1493936
26David A Mcallister1211121
26Elizabeth A Platz, Scd182858
26Vítor Borges151032
26Urs Frey1162442
26Jacob J Mayfield1417
26Ngai Sze Wong121835
26Lucia Lopalco1181732
26Sergio Ferrari1182546
26Marc Baguelin1281426
26Ravi Kant151027
26Matthew Grech-Sollars11237
26Priscilla A Furth1181132
26David J Mikulis125197
26Nicholas F Brazeau128512
26Eva Mishor11025
26Pavel Skums1739
26Nicholas G Martin115140231
26Nicholas B Link11616
26Razelle Kurzrock1497778
26Jane K Parker119811
26Tao Zhu151442
26Jelle Goeman142675
26Elizabeth R Brown141327
26Edison T Liu11329
26Peter Preiser1232645
26David Shu-cheong Hui1250123
26Xia Shen1191023
26Seyed M Moghadas1132138
26Helena Cortes-Martins1513
26Ana S Ferro15512
26Maximilian A R Strobl12612
26Abhishek Pandey113818
26Alan J Stewart181750
26Robert C Bast11649113
26Miguel E Rentería1151826
26Matt J Keeling132969
26Kaixiong Ye117520
26Mia Klinten Grand12413
26James H Hull1161827
26Ronald J Killiany1122255
26Si-Hyuck Kang172339
26Michael G Kahn1351019
26Elisabet Pujadas123313
26Angelo M De Marzo183983
26Maija T Suvanto1514
26Shinjini Kundu12326
26Katharine E Barnes1023
26Piyush K Jain12439
26Hadley D Sikes1232027
26Marianne Saevik1317
26Lilith K Whittles128515
26Aashish Srivastava12023
26Alina Nemira1712
26Mairene Coto-Llerena15512
26Steve W Cole151848
26Jennie H Kwon121817
26Anthony12023
26Isabella Overmars1324
26Carlos Mateos1711
26Markus Plass12412
26Joe Kardine1311
26Nina Urke Ertesvåg1313
26Alexander Kirpich1726
26Frederik Flindt Kreiner1213
26Stephanie Huwiler12211
26Alyssa Brown16911
26Yuanyuan Qiao116415
26Avid Mohammadi1612
26Hannah Leingang1413
26Satu Nahkuri11211
26Hoi Lok Cheng12311
26Kiren Purushotorman12312
26Matthew Nargol1811
26Nishanth Shyam1811
26Jan Stefan Olofsson1312
26Peter Kurtzhals1218
26Adam C Harding1328
26Brianna Lauren Maria Pizzano12412
26Andre Volland13612
26Sara Mercader1112
26Pavel Piler11013
26Arianna Minoia11821
26Marta Schips13613
26Takashi Akamizu193365
26Suvi T Jokiranta1513
26Xiongzhi Xiao1112
26Weijie Zhu1115
26Wenzhou Duan1112
26Randall A Bly15919
26Mahul B Amin12468
26Zoe Hu12012
26Ricky Hu12012
26Sareh Bagherichimeh1611
26Harrie F G Van Dijk12011
26Rajaram Krishnan14911
26Heath I Balcer14911
26Kiran Talekar1313
26Soohyun Kim1636
26Huan Jia12326
26Jessica Bertacco11821
26Gregor Schroeder14911
26Victor Wang12411
26Magnus Ahrholt1010
26Lydia Riepler13624
26Annika Rössler13646
26Isabelle Lang1611
26Antoni P A Hendrickx1412
26Erin P Newcomer12111
26Fatemeh Y Sinaki11211
26Vijay Pandey15924
26Arnab Bandyopadhyay13612
26Yuping Zhang116511
26Nicholas Renzette113615
26Trissia Brown12412
26Tanmay Mitra13612
26Werner Hacke1243146
26Keren Constantini11935
26Luis Garcia Dominguez12618