“…Most studies were conducted in the USA, 19,27,29,37,41,42,46–48 followed by Italy, 40,45,50,51 Turkey, 28,34,35,39 and the Netherlands 33,36,38,58 . Five studies were multisite and included countries such as France, Spain, Germany, Belgium, Switzerland, Denmark, Canada, Ireland, Australia, Nepal, Peru, and India 9,21,26,52,55 …”