Updated project metadata. Human platelets were treated with 20 µM of ADP for 10, 30 and 60 s in triplicate. In a second experiment blood donations of three donors were split again in four fractions and one was treated with 20 µM of ADP and the second and third with 20 µM of ADP for 30 s and subsequently with 2 nM of Iloprost for further 30 s and 60 s.