Authors: Muna F. Okoli, Malachy C. Ugwu, Kene C. Ezejiegu, Ugonna Morikwe.
Authors: Robert L. Stout, Steven J. Rigatti.
Authors: Sweetness Naftal Laizer, Asia Hemed, Perry M. Cyril, Zuhura Lintu, Sanjura Mandela Biswaro, Blandina Theophil Mmbaga, Agnes Cyril Msoka.
Authors: Fils Landry Mpelle, Sekangue Obili Jery, Esther Nina Ontsira Ngoyi, Etienne Nguibi, Jean Bertin Mouankié, Rachel Moyen, Simon Charles Kobawila, Gabriel Ahombo.
Authors: Patrick Nemechek DO, Ivan Evlogiev.
Authors: Glady Gilbert, Bahi-Jaber Narges.
Authors: Rolf Bambauer, Ralf Schiel.