The state's large size and rough terrain have historically complicated transportation. Texas has compensated by building the nation's largest highway and railway systems. The regulatory authority, the Texas Department of Transportation (TxDOT), maintains the state's highway system, regulates aviation...
Program in Parasitic Biology in the Amazon Region (PPGBPA), State University of Pará (UEPA), Belém 66087-662, PA, Brazil 2 Department of Health of Pará State, EpiSUS Intermediário, Belém 66093-677, PA, Brazil 3 Program in Epidemiology and Health Surveillance (PPGEVS), Evandro Chagas ...