Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) DOUGHERTY PM,Enhancement of spinothalamic neuron responses to chemical and mechanical stimuli following combined micro-iontophoretic application of N-methyl-D-aspartic acid and substance P,Pain,,,1991,47,,85-93,https://cir.nii.ac.jp/crid/1570572700049323904,