Dowling K C, Blanco L E, Martínez I, Aragón A, Bernard C E, Krieger R I
Occupational Health Project, Department of Preventive Medicine, National Autonomous University of Nicaragua, León, Nicaragua.
Bull Environ Contam Toxicol. 2005 Feb;74(2):380-7. doi: 10.1007/s00128-004-0595-6.