Pamudji Utomo; Mujaddid Idulhaq; Agus Wahyudi; Tulandi, M. qathar R. T. THE EFFECT OF VITAMIN D3 SUPPLEMENTATION PER ORAL AND SUN EXPOSURE ON THE EMPLOYEES OF PROF. DR. R SOEHARSO ORTHOPEDIC HOSPITAL OF SURAKARTA WITH VITAMIN D INSUFICIENCY OR DEFICIENCY. JMJ 2020, 8, 166-171.