Arterial blood gases Dawson Creek and District HospitalFort St. John Hospital and Peace VillaPrince George - University Hospital of Northern BC (UHNBC)Terrace - Ksyen Regional Hospital Detailed pulmonary function Prince George - University Hospital of Northern BC (UHNBC) Home oxygen assessment may include: resting saturations, room air ABG, exercise desaturation, overnight oximetry Dawson Creek and District HospitalFort St. John Hospital and Peace VillaPrince George - University Hospital of Northern BC (UHNBC)Terrace - Ksyen Regional Hospital Methacholine challenge Prince George - University Hospital of Northern BC (UHNBC) Overnight oximetry Dawson Creek and District HospitalFort St. John Hospital and Peace VillaPrince George - University Hospital of Northern BC (UHNBC)Terrace - Ksyen Regional Hospital Respiratory muscle function Prince George - University Hospital of Northern BC (UHNBC) Six minute walk Dawson Creek and District HospitalFort St. John Hospital and Peace VillaPrince George - University Hospital of Northern BC (UHNBC)Terrace - Ksyen Regional Hospital Spirometry Dawson Creek and District HospitalFort St. John Hospital and Peace VillaFraser Lake Community Health CentreHazelton - Wrinch Memorial HospitalKitimat General Hospital and Health CentrePrince George - University Hospital of Northern BC (UHNBC)Prince Rupert Regional HospitalQuesnel - GR Baker Memorial HospitalSmithers - Bulkley Valley District HospitalTerrace - Ksyen Regional HospitalVanderhoof - St. John Hospital