Factorial analysis of N-acetylcysteine and propolis treatment effects on symptoms, life quality and exacerbations in patients with Chronic Obstructive Pulmonary Disease (COPD): a randomized, double-blind, placebo-controlled trial.

Objective: Standard treatment for chronic obstructive pulmonary disease (COPD) includes inhalation therapy along with mucoactive drugs. The aim of this study was to assess the efficacy and safety of orally administered mucolytic N-acetylcysteine and propolis (NACp) in COPD patients.

Patients And Methods: A randomized, double-blind, prospective, interventional, 6 months study was conducted at the Institute for Pulmonary Diseases of Vojvodina, Sremska Kamenica, Serbia.

Early childhood caries in multilingual community.

Objective: The aim of the study was to determine the prevalence and severity of early childhood caries (ECC) among different social groups of preschool children in ethnic and multilingual diverse community such as South Backa District (SBD), Republic of Serbia.

Methods: This survey was a cross-sectional analytical study and sample type has been projected by simple random choice of 13-71 months old children together with their parents of varied socioeconomic status (SES) and nationality in SBD. Preschool children were randomly selected through a two-stage cluster sampling procedure and parents were invited to answer the questionnaire regarding SES, native language, education, and income issues.