The Methods
\cite{Feynman_1986} section appears in all online original research articles and should contain all elements necessary for interpretation and replication of the results. Methods should be written as concisely as possible and typically do not exceed 3,000 words but may be longer if necessary. We encourage you to deposit any step-by-step protocols used in your study in
Protocol Exchange, an open resource maintained by NPG. These protocols are linked to the Methods section upon publication.