Scientific publishing giant Elsevier put out a total of six publications between 2000 and 2005 that were sponsored by unnamed pharmaceutical companies and looked like peer reviewed medical journals, but did not disclose sponsorship, the company has admitted.

Elsevier is conducting an “internal review” of its publishing practices after allegations came to light that the company produced a pharmaceutical company-funded publication in the early 2000s without disclosing that the “journal” was corporate sponsored.

For their part, Elsevier execs claim they didn’t know it was happening::

It has recently come to my attention that from 2000 to 2005, our Australia office published a series of sponsored article compilation publications, on behalf of pharmaceutical clients, that were made to look like journals and lacked the proper disclosures. This was an unacceptable practice, and we regret that it took place.