Just came to know about a tool called PubFocus. This would be useful for those having interest in statistical analysis of published articles in Medline. http://www.pubfocus.org/ "Pubfocus performs statistical analysis of the MEDLINE/PubMed search queries enriched with the additional information gathered from journal impact factor database and forward referencing database. PubFocus outputs basic statistical information on publication trends, publishing journals and most prolific authors including separate analysis of the first authors (commonly most contributing scientists) and last authors (commonly principal investigators)." Just tried out, it takes lot of time. But since it is free without any alternative - it is worth it. --Sukhdev Singh, http://indmed.nic.in NIC. New Delhi.