Influence of Ramadan fasting on physiological and performance variables in football players: Summary of the F-MARC 2006 Ramadan fasting study - Zerguini, Y.; Dvorak, J.; Maughan, R. J.; Leiper, J. B.; Bartagi, Z.; Kirkendall, D. T.; Al-Riyami, M.; Junge, A. (Journal of Sports Sciences, 2008)