[Clinical research in service of clinical medicine: Contexts, practice, methodology and theory of Paul Martini's "clinical proof" - part 2: Martini's early therapeutic research].

This article aims to examine Paul Martini's early therapeutic research. It traces the development and early practice of his methodology by focussing on four clinical studies which Martini conducted in the years 1928 to 1932. The studies show a methodological transition from uncontrolled drug evaluation to systematic method-based drug testing and the production of increasingly valid results. In addition, we address Martini's inaugural lecture in Bonn (1932) as a source of important conceptual considerations. With its publication in 1932, the "Methodenlehre der therapeutischen Untersuchung" became a firm basis and standard for therapeutic research practice for Martini, which he applied not only to his own, but to all clinical studies.