FFICACY AND SAFETY OF NEM (R) ARTRO(NEM (R)-STRATUM NUTRITION) BRAND EGGSHELL MEMBRANE IN PATIENTS WITH KNEE OSTEOARTHRITIS ACCOMPANYING WITH JOINT PAIN AND STIFFNESS. A MULTI-CENTER, RANDOMIZED, DOUBLE-BLIND, PLACEBO-CONTROLLED, CROSSOVER STUDY - (:unkn) unknown (BMJ PUBLISHING GROUP, 2016)