Biomarkers in relation to the effects of ticagrelor in comparison with clopidogrel in non-ST-elevation acute coronary syndrome patients managed with or without in-hospital revascularization a substudy from the prospective randomized platelet inhibition and patient outcomes (PLATO) trial Wallentin, Lars; Lindholm, Daniel; Siegbahn, Agneta; Wernroth, Lisa; Becker, Richard C.; Cannon, Christopher P.; Cornel, Jan H.; Himmelmann, Anders; Giannitsis, Evangelos; Harrington, Robert A.; Held, Claes; Husted, Steen; Katus, Hugo A.; Mahaffey, Kenneth W.; Steg, Ph. Gabriel; Storey, Robert F.; James, Stefan K.