Long-term effect of hyperoxemia during chronic obstructive pulmonary disease exacerbation managed by emergency medical service and emergency department: a prospective, exploratory study

• Beng Leong LimNg Teng Fong General Hospital
• Si Oon CheahNg Teng Fong General Hospital
• Hsin Kai GohKhoo Teck Puat Hospital
• Francis Chun Yue LeeKhoo Teck Puat Hospital
• Yih Yng NgMinistry of Defence
• Marxengel Asinas‐TanNg Teng Fong General Hospital
• Marcus Eng Hock OngSingapore General Hospital