1. Cotes JE, Gilson JC. Effect of oxygen on exercise ability in chronic respiratory insufficiency: use of portable apparatus. Lancet. 1956. 270:872–876.
2. Stark RD, Finnegan P, Bishop JM. Daily requirement of oxygen to reverse pulmonary hypertension in patients with chronic bronchitis. Br Med J. 1972. 3:724–728.
3. Stewart BN, Hood CI, Block AJ. Long-term results of continuous oxygen therapy at sea level. Chest. 1975. 68:486–492.
4. Petty TL, Nett LM, Finigan MM, Brink GA, Corsello PR. A comprehensive care program for chronic airway obstruction: methods and preliminary evaluation of symptomatic and functional improvement. Ann Intern Med. 1969. 70:1109–1120.
5. Nocturnal Oxygen Therapy Trial Groups. Continuous or nocturnal oxygen therapy in hypoxemic chronic obstructive lung disease: a clinical trial. Ann Intern Med. 1980. 93:391–398.
6. Fulmer JD, Snider GL. ACCP-NHLBI National Conference on Oxygen Therapy. Chest. 1984. 86:234–247.
7. Guyatt GH, McKim DA, Austin P, Bryan R, Norgren J, Weaver B, et al. Appropriateness of domiciliary oxygen delivery. Chest. 2000. 118:1303–1308.
8. Chaney JC, Jones K, Grathwohl K, Olivier KN. Implementation of an oxygen therapy clinic to manage users of long-term oxygen therapy. Chest. 2002. 122:1661–1667.
9. Huh JW, Lee JY, Hong SB, Oh YM, Shim TS, Lim CM, et al. Long-term oxygen therapy in patients with chronic respiratory failure in one university hospital. Tuberc Respir Dis. 2005. 58:160–166.
10. Lee YS, Cha SI, Han CD, Kim CH, Kim YJ, Park JY, et al. Clinical experience of long-term home oxygen therapy. Tuberc Respir Dis. 1993. 40:283–291.
11. AARC. AARC clinical practice guideline. Oxygen therapy in the home or alternate site health care facility-2007 revision & update. Respir Care. 2007. 52:1063–1068.
12. The Korean Academy of Tuberculosis and Respiratory Disease. Clinical practice guideline of chronic obstructive lung disease. 2005. 1st ed. Seoul: The Korean Academy of Tuberculosis and Respiratory Disease.