Dr. Jonas Ranstam is the most prolific peer reviewer in the world and has reviewed as many as 661 papers in a year. In 2016, he was the overall winner of the Sentinels of Science Awards initiated by Publons to recognize the efforts of reviewers. He was also acknowledged as one of the Top Reviewers for 2016 by Publons.

Before retiring from being a full-time academic, Dr. Ranstam was affiliated with several institutions, including Lund University, Sweden, as Professor and senior lecturer of medical statistics. Currently, as a medical statistician, Dr. Ranstam acts as a statistical advisor to clinical and epidemiological investigators at academic and research institutions, hospitals, governmental agencies, and private companies.

He also offers his expertise to Osteoarthritis and Cartilage (as deputy editor), the British Journal of Surgery (as statistical editor), and Acta Orthopaedica (as a statistics consultant), and a statistical reviewer for several international scientific medical journals. He also maintains the Statistical Mistakes blog, which focuses on systematic reviews of statistical mistakes in medical research and presents references to literature describing how to avoid such mistakes.