[1] Boehringer Ingelheim Pharmaceut Inc, 90 E Ridge POB 368, Ridgefield, CT 06877 USA
[2] Yale Univ, Sch Med, Endocrinol Sect, New Haven, CT USA
[3] Mt Sinai Hosp, Lunenfeld Tanenbaum Res Inst, Toronto, ON, Canada
[4] Univ Toronto, Div Endocrinol, Toronto, ON, Canada
[5] Boehringer Ingelheim Ltd, Bracknell, Berks, England
[6] Univ Toronto, St Michaels Hosp, Div Cardiol, Toronto, ON, Canada