The impact of the implementation of physician assistants in inpatient care: A multicenter matched-controlled study. oleh Marijke J C Timmermans, Anneke J A H van Vught, Yvonne A S Peters, Geert Meermans, Joseph G M Peute, Cornelis T Postma, P Casper Smit, Emiel Verdaasdonk, Tammo S de Vries Reilingh, Michel Wensing, Miranda G H Laurant