Case C-48/19: Judgment of the Court (Sixth Chamber) of 5 March 2020 (request for a preliminary ruling from the Bundesfinanzhof — Germany) — X-GmbH v Finanzamt Z (Reference for a preliminary ruling — Taxation — Common system of value added tax — Directive 2006/112/EC — Article 132(1)(c) — Exemptions — Provision of medical care in the exercise of the medical and paramedical professions — Telephone services — Services provided by nurses and medical assistants)