海拔可能也扮演一个角色，他告诉医学新闻。

Altitude may also play a role, he tells WebMD.

youdao

他离开了医学界，开始从事新闻工作。

He left the medical profession and took to journalism.

youdao

注：本新闻来源于《英国医学杂志》的新闻发布机构。

Note: This story has been adapted from a news release issued by BMJ-British Medical Journal.

youdao

注：本新闻来源于《英国医学杂志》的新闻发布机构。

Note: This story has been adapted from a news release issued by BMJ-British Medical Journal.

youdao