preferred_name: factor VIIIa + factor IXa -> factor VIIIa:factor IXa (Mus musculus)
preferred_name_lc: factor viiia + factor ixa -> factor viiia:factor ixa (mus musculus)
label: factor VIIIa + factor IXa -> factor VIIIa:factor IXa (Mus musculus)
label_lc: factor viiia + factor ixa -> factor viiia:factor ixa (mus musculus)