Changes

* [[Timeline of nuclear medicine]]

Remove from list when updated to contract work page [https://contractwork.vipulnaik.com/worker.php?worker=Sebastian+Sanchez] and [https://github.com/vipulnaik/contractwork/blob/master/contributor-lists/sebastian-sanchez-list.mediawiki].

* [[Timeline of nursing]] (returned with feedback) (I added events on gender differences, also specializations, technology)

* [[Timeline of organ transplantation]] (returned with feedback) (I added Info on policies regarding organ traffic, journals and books)

* [[Timeline of first aid]] (returned with feedback)

* [[Timeline of the Centers for Disease Control and Prevention]]