Celltrion Inc. has begun a Phase 3 clinical trial of CT-P42, an aflibercept biosimilar referencing Regeneron’s Eylea. The trial will enroll 300 patients with diabetic macular edema, and aims to compare CT-P42’s efficacy, safety, pharmacokinetics, and immunogenicity against Eylea. Celltrion adds CT-P42 to its pipeline of other investigational biosimilars, including…