“…Only four studies were clinical trials. 10,[23][24][25] Investigations were designed prevalently as national studies (10/14) 6,8,10,12,[15][16][17]22,23,26 and carried out in North America, 10,15 Europe, 8,16,17,22,26 South America, 6,23 and Australia. 12 Brazil was the only represented South American country, 6,23 and no data were present to represent Asian and African countries.…”