References: Co-occurring Conditions

1. Comorbidity - Wikipedia - The general concept of co-occurring conditions and why they complicate diagnosis and treatment — this chapter's organizing idea.

2. Learning disability - Wikipedia - Definitions and types of specific learning disabilities including dyslexia, ADHD's most common academic traveler.

3. Bipolar disorder - Wikipedia - The episodic mood disorder whose surface overlap with ADHD makes the chronic-versus-episodic distinction in this chapter matter.

4. Taking Charge of Adult ADHD (Second Edition) - Russell A. Barkley - Guilford Press - Barkley's comorbidity chapters established the practical habit this chapter teaches: re-screen before re-dosing, because a majority of ADHD arrives with company and treatment stalls usually mean something else is true.

5. Smart but Scattered - Peg Dawson and Richard Guare - Guilford Press - Dawson and Guare's executive-skills profile approach — mapping each child's specific strong and weak skills rather than treating diagnosis as destiny — shaped how clinicians untangle ADHD from look-alike and traveling conditions.

6. ADHD Resource Center - American Academy of Child and Adolescent Psychiatry - Professional-body guidance on ADHD with co-occurring anxiety, depression, ODD, and learning problems.

7. ADHD and Sleep - Sleep Foundation - Clinician-reviewed coverage of delayed sleep phase, sleep apnea mimicry, and the amplifier loop this chapter describes.

8. 988 Suicide & Crisis Lifeline - SAMHSA - The US crisis line referenced in this chapter's safety rules: call or text 988; available 24/7.

9. ADHD - NIMH - National Institute of Mental Health - Includes co-occurring condition overviews and links to NIMH pages for anxiety, depression, and autism.

10. ADHD - MedlinePlus - US National Library of Medicine - Gateway to vetted information on each traveling condition, useful when one of this chapter's screening tells rings true.