Genetic testing in inherited endocrine disorders: joint position paper of the European reference network on rare endocrine conditions (Endo-ERN) oleh Thomas Eggermann, Miriam Elbracht, Ingo Kurth, Anders Juul, Trine Holm Johannsen, Irène Netchine, George Mastorakos, Gudmundur Johannsson, Thomas J. Musholt, Martin Zenker, Dirk Prawitt, Alberto M. Pereira, Olaf Hiort, on behalf of the European Reference Network on Rare Endocrine Conditions (ENDO-ERN