Question: Who was the father of a German Physiologist whose theories were used by James V. Sheridan?
Context: The sphygmograph ( ) was a mechanical device used to measure blood pressure in the mid-19th century.  It was developed in 1854 by German physiologist Karl von Vierordt (1818–1884).  It is considered the first external, non-intrusive device used to estimate blood pressure. Paul Oskar Morawitz (April 3, 1879 in St. Petersburg – July 1, 1936) was a German internist and physiologist whose most important work was in studying the coagulation of blood. Daniel Israel Arnon (November 14, 1910 – December 20, 1994) was a Polish-born American plant physiologist whose research led to greater insights into the operation of photosynthesis in plants.  In 1973, he was awarded the National Medal of Science for "his fundamental research into the mechanism of green plant utilization of light to produce chemical energy and oxygen and for contributions to our understanding of plant nutrition." Abdul Rachman Saleh Airport (IATA: MLG, ICAO: WARA, formerly WIAS) is an airport serving Malang, the second largest city in East Java province of Indonesia.  This airport is named after Abdoel Rachman Saleh, an Indonesian aviator and physiologist whose plane was shot down by the Dutch when landing in Maguwo Airfield (now Adisucipto International Airport), Sleman Regency, Yogyakarta during Indonesian National Revolution. Immanuel Munk (30 May 1852, Posen – 1 August 1903, Berlin) was a German physiologist.  He was the younger brother of physiologist Hermann Munk (1839–1912). Pierdomenico Perata (born 24 March 1962 in Genova) is an Italian physiologist whose activities are focused on plant physiology and plant biology.  Since 8 May 2013 he has been the rector of the Scuola Superiore Sant’Anna. Ludimar Hermann (October 31, 1838, Berlin – June 5, 1914, Königsberg) was a German physiologist and speech scientist who used the Edison phonograph to test theories of vowel production, particularly those of Robert Willis and Charles Wheatstone.  He coined the word "formant", a term of importance in modern acoustic phonetics.  The Hermann Grid is named after him; he was the first to report the illusion in scientific literature. In anatomy and neurophysiology, this is the finding that the anterior spinal nerve roots contain only motor fibers and posterior roots only sensory fibers and that nerve impulses are conducted in only one direction in each case.  The nature and the physiology of the phenomena were described independently by the British anatomical scientist Sir Charles Bell and the French physiologist François Magendie, later confirmed by the German physiologist Johannes Peter Müller. Cancell, also called Protocel, Sheridan's Formula, Jim's Juice, Crocinic Acid, JS–114, JS–101, 126–F, and Entelev, is a formula that has been promoted as a treatment for a wide range of diseases, including cancer.  Cancell is available in tablet and liquid form.  Originally called Entelev, the formula was developed by biochemist James V. Sheridan.  Sheridan sought to target the primarily anaerobic cell metabolism of cancer cells (following the theories of Otto Warburg), claiming to lower cell potential leading to the destruction of cancer cells.  The Cancell formula was tested by the National Cancer Institute and found to be ineffective against cancer, though Cancell continues to be marketed as a dietary supplement in the US. Otto Heinrich Warburg ( ; 8 October 1883 – 1 August 1970), son of physicist Emil Warburg, was a German physiologist, medical doctor, and Nobel laureate.  He served as an officer in the elite Uhlan (cavalry regiment) during the First World War, and was awarded the Iron Cross (1st Class) for bravery.  He was the sole recipient of the Nobel Prize in Physiology or Medicine in 1931.  In total, he was nominated for the award 47 times over the course of his career.
Answer: Emil Warburg