Superiority of a combined treatment of Alendronate and Alfacalcidol compared to the combination of Alendronate and plain vitamin D or Alfacalcidol alone in established postmenopausal or male osteoporosis (AAC-Trial)
(1) Medical Clinic 4, Leverkusen Clinic (University of Cologne), Leverkusen, Germany;(2) ZORG, Zurich Osteoporosis Research Group, Zurich, Switzerland;(3) idv Data Analysis and Study Planning, Gauting, Germany