[1] Dublin City Univ, Dublin, Ireland
[2] Univ Athens, Med Sch, Lab Expt Surg & Surg Res NS Christeas, Athens, Greece
[3] Univ Athens, Athens, Greece
[4] Albert Einstein Coll Med, Bronx, NY 10467 USA
[5] Temple Univ, Philadelphia, PA 19122 USA
[6] Francis Crick Inst, London, England
[7] Univ Patras, Panepistimioupoli Patron, Greece
[8] Rutgers State Univ, Newark, NJ USA
[9] Univ Manchester, Manchester, Lancs, England
[10] Univ Crete, Univ Hosp Heraklion, Iraklion, NE, Greece
[11] Aristotelian Univ Thessaloniki, Thessaloniki, Greece
[12] Stadt Klinikum Dessau, Auenweg, Germany
[13] Univ Colorado, Denver VAMC, Denver, CO 80202 USA
[14] Univ Houston, Houston, TX USA
[15] Univ Debrecen, Debrecen, Hungary
[16] Univ Penn, Philadelphia, PA 19104 USA
[17] Columbia Univ, New York, NY USA
[18] Med Univ Plovdiv, Plovdiv, Bulgaria
[19] Univ Zurich, Zurich, Switzerland
[20] Univ Montpellier 3, Montpellier III, France