Standardization of the PFA-100(R) platelet function test in 105 mmol/l buffered citrate: effect of gender, smoking and oral contraceptives - Bock,M.; DE Haan,J.; Beck,K.H.; Gutensohn,K.; Hertfelder,H.J.; Kager,R.; Hein,M.U.; Beeser,H.; Weber,D.; Kretschmer,V. (British Journal of Haematology, 1999)