In 2016, the World Journal of Gastroenterology(WJG)has published the 39^thissue which containing 19 articles including one Diagnostic Advances, seven Reviews, eight Original Articles, one Meta-Analysis and two Case Report contributed byscientists worldwide. Among these comprehensive articles are (1) “Update on the endoscopic treatments for achalasia”, a Review article by Andrew Y Wang, MD, AGAF, FACG, FASGE, Associate Professor, et al fromDivision of Gastroenterology and Hepatology, University of Virginia Health System, United States; (2) “Human bocavirus: Current knowledge and future challenges”, a Review article by Marcello Guido, Professor, et al from Laboratory of Hygiene, Department of Biological and Environmental Sciences and Technologies, Faculty of Sciences, University of Salento, Italy; and (3) “22-gauge core vs 22-gauge aspiration needle for endoscopic ultrasound-guided sampling of abdominal masses”, a Randomized Clinical Trial article by Athanasios D Sioulas, MD, PhD, et al from Department of Interdisciplinary Endoscopy, University Hospital Hamburg-Eppendorf, Germany, etc. We invite you to peruse all 19 articles in this issue, as they present the latest research progress/findings and provide insightful comments in gastroenterology and hepatology that will guide basic research and clinical practice in these fields.

Figure 1 The cover of the issue.Editorial board member of World Journal of Gastroenterology, Il Han Song, MD, PhD, Professor, Division of Hepatology, Department of Internal Medicine, Dankook University College of Medicine, Dankook University Hospital, Cheonan 330-715, South Korea.

We encourage gastroenterologists and hepatologists worldwide to submit manuscripts to the WJG describing their original basic or clinical research findings that are of high academic value and which report new diagnostic techniques or summarize their treatment experiences.

We invited the readers to download and read the E-Journal of this issue: WJGv22i39.