RT Journal Article SR Electronic T1 Piezogenic pedal papules JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP cmaj.121963 DO 10.1503/cmaj.121963 A1 Dong-Lai Ma A1 Sergio Vano-Galvan YR 2013 UL http://www.cmaj.ca/content/early/2013/06/24/cmaj.121963.abstract AB