“…All studies were conducted on outpatient samples. Ten studies adopted an RCT methodology (10/37; 27.0%), 11 , 16 , 20 , 21 , 28 , 29 , 31 , 39 , 40 , 46 five were follow-up studies (5/37; 13.5%), 17 – 19 , 30 , 47 eleven were based on secondary analyses carried out on the same samples of RCTs (11/37; 29.7%), 50 – 54 , 58 , 59 , 61 , 62 , 64 , 67 three were case series or case reports (3/37; 8.1%), 55 , 66 , 69 four were pilot studies (10.8%), 45 , 55 , 68 , 70 and four were studies with experimental designs other than RCTs (retrospective, 57 quasi-experimental, 60 community based, 63 laboratory meal 65 (4/37; 10.8%).…”