Perform a new Entrez search using terms in indexed fields. It is part of the
edirect
package. More information: https://www.ncbi.nlm.nih.gov/books/NBK179288/.
esearch -db pubmed -query "{{selective serotonin reuptake inhibitor}}"
esearch -db {{protein}} -query {{'Escherichia*'}}
esearch -db nuccore -query "{{insulin [PROT] AND rodents [ORGN]}}"
esearch -h