- Systematic genetic study of Alzheimer disease in Latin America: mutation frequencies of the amyloid beta precursor protein and presenilin genes in Colombia. Arango, D., Cruts, M., Torres, O., Backhovens, H., Serrano, M.L., Villareal, E., Montañes, P., Matallana, D., Cano, C., Van Broeckhoven, C., Jacquier, M. Am. J. Med. Genet. (2001)