body areas affected included head/neck ( 7.6 % ) , shoulder ( 13.3 % ) , upper arm ( 1.4 % ) , elbow ( 3.4 % ) , lower arm ( 2.0 % ) , wrist ( 2.9 % ) , hand/fingers ( 11.9 % ) , chest/ribs ( 3.4 % ) , back ( 4.9 % ) , abdomen ( 0.7 % ) , groin ( 0.7 % ) , hip ( 2.4 % ) , upper leg ( 4.6 % ) , knee ( 22.2 % ) , lower leg ( 4.0 % ) , ankle ( 10.9 % ) , and foot/toes ( 4.2 % ) .
C0023216
leg
C0016504
foot