if (FALSE) {
# abstract found
cr_abstract('10.1109/TASC.2010.2088091')
cr_abstract("10.1175//2572.1")
cr_abstract("10.1182/blood.v16.1.1039.1039")
# doi not found
# cr_abstract(doi = '10.5284/1011335')
# abstract not found, throws error
# cr_abstract(doi = '10.1126/science.169.3946.635')
# a random DOI
# cr_abstract(cr_r(1))
}
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