Joined Cases C-133/17 and C-134/17: Judgment of the Court (Tenth Chamber) of 21 March 2018 (requests for a preliminary ruling from the Curtea de Apel Cluj — Romania) — Dănuţ Podilă and Others v Societatea Națională de Transport Feroviar de Călători ‘CFR Călători’ SA București (C-133/17), Costel Nicușor Mucea v SMDA Mureş Insolvency SRL, acting as liquidator in the insolvency of SC Industria Sârmei SA Campia Turzii (C-134/17) (Reference for a preliminary ruling — Directive 89/391/EEC — Safety and health of workers at work — Classification of work places as places characterised by particular or special conditions — Assessment of the risks to safety and health at work — Employer’s obligations)