The association between family doctor contract services and the health of middle-aged and older people in China: an instrumental variables analysis
Borders, T. F., Rohrer, J. E., Hilsenrath, P. E. & Ward, M. M. Why rural residents migrate for family physician care. J. Rural Health 16(4), 337–348. hsi (2000). Article CAS PubMed Google Scholar Velasco Garrido, M., Zentner, A. & Busse, R. The effects of gatekeeping: a systematic review of the literature. Scand. J. Prim. Health … Leer más