Donald S Crain, MD ndi Michael T Marshall, MD ndi John E Kehoe, MD:
"Zikuoneka kuti pali mgwirizano pakati pa kugwiritsa ntchito zolaula ndi kusokonezeka kwa kugonana mwa amuna omwe amanena kuti amakonda kuseweretsa maliseche ndi zolaula m'malo mogonana."