TY - JOUR T1 - Black hairy tongue: What is your call? JF - Canadian Medical Association Journal JO - CMAJ SP - 1137 LP - 1138 DO - 10.1503/cmaj.071611 VL - 178 IS - 9 AU - Emmet E. McGrath, MB AU - Philip Bardsley MD AU - Gurnan Basran MD Y1 - 2008/04/22 UR - http://www.cmaj.ca/content/178/9/1137.abstract ER -