[1] Univ Toronto, Fac Med, Inst Med Sci, Toronto, ON, Canada
[2] Jamieson Labs Ltd, Windsor, ON, Canada
[3] Univ Toronto, Fac Pharm, Toronto, ON M5S 2S2, Canada
[4] Baycrest Ctr Geriatr Care, Toronto, ON M6A 2E1, Canada
[5] Childrens Hosp Eastern Ontario, Inst Res, Ottawa, ON K1H 8L1, Canada
[6] Univ London, Sch Pharm, Ctr Pharmacognosy & Phytotherapy, London WC1N 1AX, England
[7] Inst Work & Hlth, Toronto, ON M5G 2E9, Canada