The limited number of included studies precludes us from conducting publication bias analyses for liver, prostate, or stomach cancer.
An electronic literature search was conducted for publications to 1 May 2014.
A database search was conducted for publications between January 2015 and February 2017 using keywords related to EAIs including their functionality and features, carriage, prescription rates, barriers, and side effects.
A systematic search was conducted for publications using decision modelling to investigate the cost-effectiveness of NPIs for individuals with dementia.
However, no studies of collaborations in stem cell research have been conducted on publications with co-authors from two of the leading countries in this field, the US and the UK.
Standard database and web-based searches were conducted for publications in English between 1990 and 2010.
For this purpose, a survey was conducted of publications found in the MEDLINE database from 1969 through April 30 , 2015
A literature search, with specific indexing terms and a hand search, was conducted for publications that described a method to diagnose oral dryness.
Since this study was conducted, several publications have described the role of VASH1 in regulating EC proliferation, vascular tube generation and vascular maturation [ 50, 54][ 55], as well as a potentially wider functional role in other cell types [ 56].
For this review, searches were conducted for publications that appeared on the PubMed database up to the end of 2007 that describe clinical trials of atorvastatin, pravastatin, rosuvastatin, and simvastatin; this generated 2,630 citations.
