Če laboratorij sporoči razmerje T/E v urinu, večje od štiri (4) proti ena (1), so nadaljnje preiskave obvezne, zato da se ugotovi, ali je razmerje posledica fiziološkega ali patološkega stanja, razen če laboratorij sporoči pozitivni laboratorijski rezultat, ki z zanesljivo analitično metodo dokazuje, da je prepovedana snov eksogenega izvora.
If the laboratory has reported the presence of a T/E ratio greater than four (4) to one (1) in the urine, further investigation is obligatory in order to determine whether the ratio is due to a physiological or pathological condition, except if the laboratory reports an Adverse Analytical Finding based on any reliable analytical method, showing that the Prohibited Substance is of exogenous origin.