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.
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Operative Techniques in Thoracic and Cardiovascular Surgery: A Comparative Atlas provides technique-based articles in cardiovascular and thoracic surgery by renowned surgeons in the field, presented in atlas format. Each issue of the quarterly publication contains articles each in adult, congenital, general thoracic surgery, and transplantation. Each pair of articles explores a single topic in a point/counterpoint approach. Numerous original line drawings intraoperative photographs, and imaging studies are included in each issue to illustrate the different operative approaches.