ABG	Arterial blood gases
ED	Emergency department
HDU	High dependency unit
ICU	Intensive care unit
LABA	Long-acting beta2-agonists
LAMA	Long-acting muscarinic agonists
LLN	Lower limits of normal
LTOT	Long-term oxygen therapy
NIV	Non-invasive mechanical ventilation
OSA	Obstructive sleep apnea
PCV13	13-valent pneumococcal conjugate vaccine 2
PPSV23	3-valent polysaccharide vaccine
QIV	Quadrivalent influenza vaccine
QoL	Quality of life
SPT	Skin prick test
TIV	Trivalent influenza vaccine