Fig. 3

Referenced Publication Years Spectroscopy of Health Equity (1800–1965). Notes:The peaks with seminal works appeared in 1842, 1845, 1897, 1899, 1939, 1946, 1948, 1950, 1951, 1954, 1958 and 1963. The peaks of 1848, 1855, 1859, and 1942 were without seminal works related to health equity