Administration, RectalIndomethacinCholangiopancreatography, Endoscopic RetrogradeIncidenceCyclooxygenase InhibitorsAnti-Inflammatory Agents, Non-SteroidalProstaglandinsDinoprostoneProstaglandins EProstaglandin-Endoperoxide SynthasesDuctus Arteriosus, PatentProstaglandin AntagonistsCyclooxygenase 1Stomach Ulcer4,5-Dihydro-1-(3-(trifluoromethyl)phenyl)-1H-pyrazol-3-amineRisk FactorsTime Factors