1. Department of Biostatistics, University of Michigan, Ann Arbor, Michigan 48104, United States
2. Monsanto Company, 800 North Lindbergh Boulevard, St. Louis, Missouri 63167, United States
3. Monsanto do Brasil Ltda., Avenida Nações Unidas 12.901-9° andar, Torre Norte - Brooklin Novo, São Paulo, SP 04578-910, Brazil