Thematic Trends in Complementary and Alternative Medicine Applied in Cancer-Related Symptoms. - José Antonio Moral-Muñoz; Manuel Arroyo Morales; Barbara F. Piper; Antonio I. Cuesta-Vargas; Lourdes Díaz-Rodríguez; William C. S. Cho; Enrique Herrera-Viedma; Manuel J. Cobo (J. Data Inf. Sci., 2018)