1 Department of Mathematics, Harvard University, Cambridge, MA, USA.
2 Department of the History of Science, Harvard University, Cambridge, MA, USA.
3 Department of Medicine - Division of Endocrinology-Neuroendocrine, Department of Pediatrics - Division of Endocrinology, Nutrition Obesity Research Center at Harvard, Harvard Medical School, Massachusetts General Hospital, Boston, MA 02114, USA. Electronic address: fstanford@mgh.harvard.edu.