“…10,14 Furthermore, the differences in the durations of the included trials (1, 2, or 3 months) were a potential source of heterogeneity, and the follow-up time is extremely short. Finally, the types of bioabsorbable implants were different, including Gelfoam dressing (Pfizer, New York, NY), 18 NasoPore dressing (Stryker, Kalamazoo, MI), 16,17 calcium alginate dressing (Algi-Pack,Seoul), 21 SinuBand dressing (MedtronicXomed Inc., Jacksonville), 20 stents, 10,14 and Sinus-Foam spacer (Athrocare, Sunnyvale), 19 which may have led to heterogeneous results. To reinforce the validity of our meta-analysis, clinical trials of the same implant soaked in steroid following ESS as well as extended followup trials should be conducted in the future.…”