RT Journal Article SR Electronic T1 Muehrcke lines JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP cmaj.120269 DO 10.1503/cmaj.120269 A1 Vishal Sharma A1 Vivek Kumar YR 2012 UL http://www.cmaj.ca/content/early/2012/08/27/cmaj.120269.abstract AB