ZHAO, B., Liu, C., Qiang, L., Liu, J., Qiu, Z., Zhang, Z., Zhang, J., Li, Y. and Zhang, M. 2022. Clinical observation of the effect of nicotinamide mononucleotide on the improvement of insomnia in middle-aged and old adults. American Journal of Translational Medicine. 6, 4 (Dec. 2022), 167–176.