- Mario Martinez
GlaxoSmithKline, Vaccine Desig; Rockville MD, United States of America
- Marco Martinez-Avila
National Institute of Pediatrics; Mexico City, Mexico; Laboratorio de Nutricion Experimental
- Maria Martinez-Valladares
University of Leon; Leon, Spain; Departamento de Sanidad Animal
CSIC-University of Leon; Leon, Spain; Instituto de Ganaderia de Montana