[1] Univ Texas Hlth Sci, San Antonio, TX USA
[2] Natl Res Inst, Los Angeles, CA USA
[3] Boehringer Ingelheim Ltd, Bracknell, Berks, England
[4] Boehringer Ingelheim Pharmaceut Inc, Ridgefield, CT 06877 USA
[5] Boehringer Ingelheim Pharma GmbH & Co KG, Ingelheim, Germany