Under a strictly controlled environment in the Botany Greenhouse grows a sweet fern — one amongst many of its like. Every now and then it feels a hand or a tweezer poking its stalk, its weeds cleared ...
For permission requests, please contact NEJM Reprints at [email protected] Select the format you want to export the citation of this publication.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results