1. Department of Pathology and Laboratory MedicineWeill Cornell Medical CollegeNew York New York and
2. Department of AnesthesiologyWeill Cornell Medical CollegeNew York New York and
3. Unilabs, Coagulation Lab & Centre for Perioperative Thrombosis and HaemostasisZurich Switzerland
4. Department of AnesthesiaZurich University Children's HospitalZurich Switzerland