Alternative model - open access

The copyright holder(s) must grant to the public a free, irrevocable, perpetual license to use, copy, distribute and make derivative works, in any medium for any purpose.
A digital copy must be deposited in an open public archival repository (for example US National Library of Medicine's PubMed Central).

The copyright holder(s) must grant to the public a free, irrevocable, perpetual license to use, copy, distribute and make derivative works, in any medium for any purpose.