From Embryology

BioMed Central Open Access BioMed Central Open Access license agreement Brief summary of the agreement.

Anyone is free: to copy, distribute, and display the work; to make derivative works; to make commercial use of the work.

Under the following conditions: Attribution, the original author must be given credit; for any reuse or distribution, it must be made clear to others what the license terms of this work are; any of these conditions can be waived if the authors gives permission.