RT Journal Article SR Electronic T1 Differential clubbing and cyanosis in a patient with pulmonary hypertension JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E380 OP E380 DO 10.1503/cmaj.091003 VO 182 IS 9 A1 Wald, Rachel A1 Crean, Andrew YR 2010 UL http://www.cmaj.ca/content/182/9/E380.abstract