Copyright © 2016, Chinese Association of Animal Science and Veterinary Medicine. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd.
This is a manuscript version of an open access article under the CC-BY-NC-ND 4.0 license/
Except where otherwise noted, this item's license is described as Copyright © 2016, Chinese Association of Animal Science and Veterinary Medicine. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is a manuscript version of an open access article under the CC-BY-NC-ND 4.0 license/