2665360 ETBD Eustachian tube balloon dilation 16 2665366 ETBD evolutionary theory of behavior dynamics 10 2665364 ETBD equivalent total body dose 3 2665359 ETBD ET balloon dilation 2 2665361 ETBD endoscopic transpapillary biliary drainage 1 2665362 ETBD equilibrium theory of biodiversity dynamics 1 2665363 ETBD equilibrium-based framework, such as the 'Equilibrium Theory of Biodiversity Dynamics 1 2665365 ETBD EUS-guided transhepatic biliary drainage 1