Gallbladder DiseasesGallbladderGallbladder NeoplasmsCholecystectomyCholecystitisGallbladder EmptyingCholelithiasisCholecystectomy, LaparoscopicCholecystographyGallstonesImino AcidsCholecystitis, AcuteCholecystolithiasisBiliary DyskinesiaAcalculous CholecystitisTechnetium Tc 99m DisofeninPolypsDesogestrelPostoperative ComplicationsContraceptives, Oral, SyntheticCholangiopancreatography, Endoscopic RetrogradeUltrasonographyRetrospective StudiesTreatment OutcomeScotlandProspective StudiesLength of StayRisk FactorsBileFollow-Up StudiesObesity