TY  - JOUR 
T1  - An improved HPLC method for the quantitation of 6-mercaptopurine and its metabolites in red blood cells
JO  - Brazilian Journal of Medical and Biological Research
A1  - Oliveira, B.M.
A1  - Romanha, A.J.
A1  - Alves, T.M.A.
A1  - Viana, M.B.
A1  - Zani, C.L.
SN  - 0100-879X
UL  - 10.1590/S0100-879X2004000500004
VL  - 37 
Y1  - 2004
PB  - Brazil 
ER  -