This heading is assigned to progressive rock music for two or more performers. --headings for music of individual instruments followed by the qualifier "(Progressive rock)" and the subdivisions Methods (Progressive rock) and Studies and exercises (Progressive rock) under individual musical instruments and families of instruments
--subdivision Diagnosis under individual diseases and types of diseases, e.g. Cancer--Diagnosis; also subdivision Diseases--Diagnosis under individual organs and regions of the body, e.g. Heart--Diseases--Diagnosis; also subdivision Diagnostic use under individual chemicals and groups of chemicals used in diagnosing diseases, e.g. Copper--Diagnostic use; and subdivision Medical examinations under topical headings, classes of persons, ethnic groups, and individual military services
