"I want it all, and I want it now": Lifetime prevalence and reasons for using and abstaining from controlled performance and appearance enhancing substances (PAES) among young exercisers and amateur athletes in five European countries - Lazuras, L.; Zelli, A.; Barkoukis, V.; Loukovitis, A.; Brand, R.; Hudson, A.; Mallia, L.; Michaelides, M.; Muzi, M.; Petroczi, A. (Frontiers in Psychology)