“…[17, 44-47, 55, 57, 61, 71] Forty-eight studies investigated the reason why EDs were used. The majority of them (37 studies) reported reasons related to study and examinations [17, 21, 33, 35-37, 39, 41, 43-47, 50, 53, 55-59, 61, 62, 65, 69, 72-74, 77-79, 81, 82, 85-87, 90, 98], while in 21 studies users declared ED consumption to keep themselves awake or alert [17, 33, 35, 39, 45, 48, 50, 54, 56-58, 62, 65, 67, 69, 79, 85-87, 89, 92] and in 18 studies reasons related to physical activity/sport performance were reported [17,33,35,37,39,45,46,48,53,56,57,71,66,69,74,86,87,91].…”