Orthostatic <scp>H</scp>ypotension in <scp>P</scp>arkinson <scp>D</scp>isease: <scp>H</scp>ow <scp>M</scp>uch <scp>Y</scp>ou <scp>F</scp>all or <scp>H</scp>ow <scp>L</scp>ow <scp>Y</scp>ou <scp>G</scp>o?
Distribution of the number of citations over years.