7Cheng ST, Wu YK, Yang MC, et al. Pulmonary rehabilitationimproves heart rate variability at peak exercise,exercisecapacity and health-related quality of life in chronic obstructivepulmonary disease[J]. Heart Lung,2014,43(3) :249-255.
10Ricci-Vitor AL, Bonfim R,Fosco LC, et al. Influence of theresistance training on heart rate variability, functional capacityand muscle strength in the chronic obstructive pulmonarydisease[J], Eur J Phys Rehabil Med,2013,49(6) :793-801.
2Janssens W, Mathieu C, Boonen S, et al. Vitamin D deficiency and chronic obstructive pulmonary disease: a vicious circle[J]. Vitam Horm, 2011, 86: 379-399.
3Black PN, Scragg R. Relationship between serum 25-hydroxy vitamin D and pulmonary function in the Third National Health and Nutrition Examination Survey[J]. Chest, 2005, 128(6): 3792-3798.
4Ginde AA, Mansbach JM, Camargo CA Jr. Association between serum 25-hydroxy vitamin D level and upper respiratory tract infection in the Third National Health and Nutrition Examination Survey[J]. Arch Intern Med, 2009, 169(4): 384-390.
5Kjensli A, Mowinckel P, Ryg MS, et al. Low bone mineral density is related to severity of chronic obstructive pulmonary disease[J]. Bone, 2007, 40(2): 493-497.
6Lang PO, Samaras D, Samaras N. Does vitamin D deficiency contribute to further impinge the state of vulnerability to infections of aging and aged adults[J]? Eur Geriatr Med, 2013, 4(1), 59.
7Berry D J, Hesketh K, Power C. Vitamin D status has a linear association with seasonal infections and lung function in British adults[J]. Br J Nutr, 2011, 106(9): 1433-1440.
8Kunisaki KM, Rector TS. Vitamin D and responses to inhaled fluticasone in severe chronic obstructive pulmonary disease[J]. Int J Chron Obstruct Pulmon Dis, 2011, 6: 29-34.
9Jorgensen NR, Schwarz P. Osteoporosis in chronic obstructive pulmonary disease patients[J]. Curr Opin Pulm Med, 2008, 14(2): 122-127.
10Lehouck A, Boonen S, Decramer M, et al. COPD, bone metabolism, and osteoporosis[J]. Chest, 2011, 139(3),648-657.