Medical API feasibility
References:
symptoms checker "http://www.webmd.com/"
http://apimedic.com/ (samples in sources: https://github.com/priaid-eHealth/symptomchecker)
http://sym.doctors.co.il/sites/sym.doctors.co.il/html/sc.html#frame-4th
http://stackoverflow.com/questions/34871386/is-there-a-good-medical-api-out-there
https://www.quora.com/What-is-the-best-API-for-medical-diagnosis
Medical data providers: