Financial & competing interests disclosure
Anil Modak is currently involved in the development and commercialization of breath tests as diagnostic tests for various enzyme deficiencies and works for Cambridge Isotope Laboratories Inc., which is the manufacturer of the 13C substrates used for breath tests.
The author has no other relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed.