Efficacy and safety of training program concentrating on the Garfinkel method as a tool for reducing polypharmacy in nursing home residents G B Ozturk1 H Ozkaya2 C Kılıc3 S Muratli4 B Ilhan5 A Tufan6 F Tufan3 Z Horasan7 H Dogan8 N Erten3 M A Karan6 D Garfinkel9