[1] Natl Canc Ctr, Div Med Sci, Lab Clin Pharmacol, Singapore, Singapore
[2] Dr Margarete Fischer Bosch Inst Clin Pharmacol, Stuttgart, Germany
[3] Univ Tubingen, Stuttgart, Germany
[4] Natl Canc Ctr, Div Med Sci, Singapore, Singapore
[5] Natl Canc Ctr Singapore, Singapore, Singapore
[6] Natl Canc Ctr, Singapore, Singapore