Estimation of serum and salivary matrix metalloproteinase levels in oral squamous cell carcinoma patients: a systematic review and meta-analysis - Rezaei, Farzad; Imani, Mohammad Moslem; Lopez-Jornet, Pia; Sadeghi, Masoud (Advances in Dermatology and Allergology/Postępy Dermatologii i Alergologii, 2021)