A different method of breath sample Assessment utilizes substrates such as xylose or glycocholic acid labeled with 13C and 14C isotopes accompanied by mass spectrographic or scintillation counting of breath samples for isotopic CO2. Sigmoidoscopies - are methods that Assess endoscopic ultrasounds to examine the higher and reduced GI tract, https://cruzkykwg.tinyblogging.com/private-gastroenterologist-london-things-to-know-before-you-buy-63543901