SNIP measures contextual citation impact by weighting citations based on the total number of citations in a subject field.
SJR is a prestige metric based on the idea that not all citations are the same. SJR uses a similar algorithm as the Google page rank; it provides a quantitative and a qualitative measure of the journal’s impact.
The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years.
© Thomson Reuters Journal Citation Reports 2015
To calculate the five year Impact Factor, citations are counted in 2014 to the previous five years and divided by the source items published in the previous five years.
© Journal Citation Reports 2015, Published by Thomson Reuters
In practical paperback format, each 200 page topic-based issue of Best Practice & Research Clinical Gastroenterology will provide a comprehensive review of current clinical practice and thinking within the specialty of gastroenterology.
All chapters are commissioned and written by an international team of practising clinicians with the Guest Editors for each issue drawn from a pool of renowned experts and opinion leaders. Reference is made to:
• The latest original research
• Cochrane Reviews
• Audits and confidential enquiries
• National and international conferences
• National and international guidelines
• Personal communications
All chapters take the form of practical, evidence-based reviews that seek to address key clinical issues of diagnosis, treatment and patient management.
Each issue follows a problem-orientated approach that focuses on the key questions to be addressed, clearly defining what is known and not known. Management will be described in practical terms so that it can be applied to the individual patient.
Boxed and bulleted Learning Objectives and Practice Points are features within each chapter and will highlight the core and essential knowledge that will help the physician to provide the best care to their patients.
The series' objective is to provide a continuous update for the busy clinician and researcher.
• Volume 29/1: Barrett's Esophagus
• Volume 29/2: Cholangiocarcinoma
• Volume 29/3: Celiac disease
• Volume 29/4: Image-enhanced endoscopy
• Volume 29/5: Eosinophilic esophagitis
• Volume 29/6: Cancer screening and prevention in Asia