SulfonesPurinesPasteurellosis, PneumonicShipsTransportationPiperazinesNaval MedicinePhosphodiesterase InhibitorsPhosphodiesterase 5 Inhibitors3',5'-Cyclic-GMP PhosphodiesterasesErectile DysfunctionCyclic Nucleotide Phosphodiesterases, Type 5Pasteurella InfectionsMannheimia haemolyticaCoronavirus, BovineProduct PackagingSpecimen HandlingBloodlettingBlood PreservationHandling (Psychology)PasteurellaBlood Specimen CollectionInfectious Bovine RhinotracheitisSulfadimethoxineCattle DiseasesPenile ErectionHomosexuality, MaleHousing, AnimalMethamphetamineVasodilator AgentsCyclic GMPSocial DominanceCattleGeorgiaAccidents, OccupationalAnimal HusbandryStress, PhysiologicalOceans and SeasUnsafe SexRisk-TakingTemperatureHydrocortisoneSexual BehaviorBody WeightTime FactorsSwine