RT Journal Article SR Electronic T1 Bier spots JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E304 OP E304 DO 10.1503/cmaj.120376 VO 185 IS 7 A1 Fang-Yih Liaw A1 Chien-Ping Chiang YR 2013 UL http://www.cmaj.ca/content/185/7/E304.abstract