TY - JOUR T1 - Alternative, science-based definition JF - Canadian Family Physician JO - Can Fam Physician SP - 19 LP - 19 VL - 63 IS - 1 AU - Robert M. Bernstein Y1 - 2017/01/01 UR - http://www.cfp.ca/content/63/1/19.2.abstract N2 - ER -