A very brief self-report scale for measuring insomnia severity using two items from the Insomnia Severity Index – development and validation in a clinical population A very brief self-report scale for measuring insomnia severity using two items from the Insomnia Severity Index - development and validation in a clinical population Download COVID-19 exposure and obstructive sleep apnea- a therapeutic approach Transcranial Electrical Stimulation targeting limbic cortex increases the duration of human deep sleep