Stechnolock Journal of Sleep Medicine and Disorders (SSMD) focuses on papers that cover and come under broad topics and is not limited to a particular aspect:

Neuropsychology
Sleep Medicines
Primary Insomnia
Bruxism
Delayed Sleep Phase Disorder 
Advanced Sleep Phase Disorder   
Hypopnea Syndrome
Narcolepsy
Idiopathic Hypersomnia
Night Terror   
Parasomnias
Periodic Limb Movement Disorder   
Rapid Eye Movement Behavior Disorder
Restless Legs Syndrome
Shift Work Sleep Disorder 
Sleep Apnea
Sleep Paralysis
Sleepwalking or Somnambulism
Nocturia
Somniphobia
Kleine–Levin Syndrome and more