Ekubuyekezweni kuka-2015, abacwaningi bahlaziye izivivinyo ezisebenzise ukukhanya okubomvu nokucishe kube yi-infrared emisipheni ngaphambi kokuzivocavoca futhi bathola ukuthi isikhathi sokukhathala kanye nenani lama-reps awenziwa ngemuva kokwelashwa kokukhanya sanda kakhulu.
"Isikhathi sokukhathala sanda kakhulu uma siqhathaniswa ne-placebo ngemizuzwana engu-4.12 kanti inani lokuphindaphinda landa ngo-5.47 ngemva kokwelashwa nge-phototherapy."
