Case T-321/18: Judgment of the General Court of 6 March 2019 — Serenity Pharmaceuticals v EUIPO — Gebro Holding (NOCUVANT) (EU trade mark — Opposition proceedings — Application for EU word mark NOCUVANT — Earlier word marks NOCUTIL — Proof of genuine use — Article 47(2) of Regulation (EU) 2017/1001 — Relative ground for refusal — Likelihood of confusion — Similarity of the signs — Article 8(1)(b) of Regulation 2017/1001)