Effect of health insurance and facility quality improvement on blood pressure in adults with hypertension in Nigeria: A population-based study - Hendriks, Marleen E.; Wit, Ferdinand W. N. M.; Akande, Tanimola M.; Kramer, Berber; Osagbemi, Gordon K.; Tanović, Zlata; Wright, Emily Gustafsson; Brewster, Lizzy M.; Lange, Joep M. A.; Schultsz, Constance (American Medical Association, 2014)