Aspin: neurosurgical aspirin intervention prognostic study — perioperative continuation versus discontinuation of aspirin in lumbar spinal surgery, a randomized controlled, noninfe... oleh Ahmed Zian, Gijsbert M. Overdevest, Pieter J. Schutte, Frederikus A. Klok, Ewout W. Steyerberg, Wouter A. Moojen, Niels A. van der Gaag