Risk factors and disability associated with low back pain in older adults in low- and middle-income countries. Results from the WHO study on global AGEing and adult health (SAGE)

- Williams, Jennifer Stewart; Ng, Nawi; Peltzer, Karl; Yawson, Alfred; Biritwum, Richard; Maximova, Tamara; Wu, Fan; Arokiasamy, Perianayagam; Kowal, Paul; Chatterji, Somnath