A network of hospitals provides inpatient treatment and specialized diagnostic and clinical facilities. All hospitals are also teaching centers for physicians, nurses, and auxiliary medical personnel. In 1971 there were 195 hospitals throughout the country, at least one in each district. Certain districts, however, were inadequately equipped with hospital facilities. The total number of beds was 57,053, or 7.6 beds per 1,000 inhabitants. One hundred and fifty-four of the hospitals, with a total of 47,839 beds, were general hospitals. There were also fifteen special tuberculosis hospitals and fifteen psychoneurological hospitals with a total of slightly over 3,000 beds in each category; five pediatric hospitals with a total of 480 beds; four obstetric and gynecological hospitals with a total of 740 beds; one hospital for infectious diseases; and one for orthopedic and plastic surgery. In addition to these district-supported hospitals, the central government operated six hospitals with a total bed capacity of 1,036 in connection with the special medical research institutes. Extended care and physical therapy for patients suffering from chronic ailments were offered by 182 sanatoriums and health spas with a total bed capacity of 16,104. The Sixth Five-Year Plan (1971-75) envisages increasing the number of hospital beds to 8.4 per 1,000 inhabitants and focusing on those areas of the country that are underserved. An increase in operating funds for the hospitals is to be channeled mostly into improving plant and equipment. Although most hospitals suffer from poor or outmoded plant and equipment, they also suffer seriously from a shortage of staff, particularly of nurses and auxiliary medical personnel. The plan states specifically that alleviation of that shortage will have to be delayed. In 1971 the country had a total of 16,183 physicians, 1.9 for every 1,000 inhabitants. The number of physicians had more than doubled in the twenty years since 1952; most of them, therefore, were between the ages of twenty-five and forty-five. The number of other medical personnel had expanded along the same lines. In 1971 there were 2,464 pharmacists; 26,381 nurses; 6,016 midwives; and 5,012 feldshers. Feldshers are paramedics trained to perform a variety of medical functions, including simple surgery, in the absence of a fully qualified physician. Many rural health centers are in the charge of feldshers and receive periodic visits from specialized physicians.