You are a medical research assistant. Search the medical textbook library database for comprehensive information on the following laryngology topics. Run PARALLEL searches using query_library_db and read_file. Return ALL relevant content you find. Topics to cover: 1. Clinical anatomy of the larynx 2. Respiratory, protective, and vocal functions of the larynx 3. Muscles of the larynx 4. Blood supply and innervation of the larynx (including peculiarities of laryngeal innervation) 5. Methods of examination of the larynx (direct and indirect laryngoscopy technique) 6. Acute stenosis of the larynx — causes, stages, clinic, diagnosis, treatment 7. Acute laryngeal oedema — cause, clinic, diagnosis, treatment 8. False croup (subglottic laryngitis) — etiology, clinic, diagnosis 9. True croup (laryngeal diphtheria) — etiology, clinic, diagnosis 10. Differential diagnosis of false vs true croup 11. Tracheostomy and conicotomy — indications and technique 12. Tracheal intubation — indications and technique 13. Acute laryngitis — clinic, diagnosis, treatment 14. Chronic laryngitis (hyperplastic, atrophic/sicca) — clinic, diagnosis, treatment 15. Acute epiglottitis (supraglottic laryngitis) 16. Tuberculosis of the larynx — clinical features 17. Foreign bodies of bronchi, trachea, and esophagus — clinic, diagnosis, treatment 18. Laryngomalacia (laryngeal stridor) — etiology, clinic, diagnosis, treatment 19. Classification of laryngeal paralysis 20. Types and technique of tracheostomy; complications of tracheotomy 21. Reinke's oedema (polypoid degeneration of vocal cords) — pathogenesis, clinic, treatment INSTRUCTIONS: 1. First, find the best books using: SELECT isbn, title, speciality FROM v_book_overview WHERE speciality LIKE '%ENT%' OR speciality LIKE '%ear%' OR speciality LIKE '%throat%' OR title LIKE '%laryn%' OR title LIKE '%otolaryn%' OR speciality LIKE '%respiratory%' ORDER BY title LIMIT 20 2. Then search headings: SELECT title, book_title, '/textbooks/' || block_file_path AS file_path, line_number, para_line_ranges, para_count FROM headings_fts WHERE headings_fts MATCH 'larynx OR laryngeal OR laryngitis OR laryngoscopy' ORDER BY rank LIMIT 20 3. Also search: SELECT title, book_title, '/textbooks/' || block_file_path AS file_path, line_number, para_line_ranges, para_count FROM headings_fts WHERE headings_fts MATCH 'tracheostomy OR croup OR epiglottitis OR stenosis' ORDER BY rank LIMIT 20 4. Also search: SELECT title, book_title, '/textbooks/' || block_file_path AS file_path, line_number, para_line_ranges, para_count FROM headings_fts WHERE headings_fts MATCH 'foreign body esophagus OR trachea OR bronchi' ORDER BY rank LIMIT 20 5. Read the most relevant file sections (use read_file with offset/limit=100 at a time, paginate as needed) 6. Also run paragraph FTS searches: SELECT book_title, section_heading, '/textbooks/' || block_file_path AS file_path, line_start, line_end, snippet(paragraphs_fts, 0, '>>>', '<<<', '...', 40) as snippet FROM paragraphs_fts WHERE paragraphs_fts MATCH 'Reinke oedema OR "vocal cord" paralysis OR laryngomalacia' ORDER BY rank LIMIT 10 7. And: SELECT book_title, section_heading, '/textbooks/' || block_file_path AS file_path, line_start, line_end, snippet(paragraphs_fts, 0, '>>>', '<<<', '...', 40) as snippet FROM paragraphs_fts WHERE paragraphs_fts MATCH 'acute laryngeal stenosis stages OR "stages of stenosis"' ORDER BY rank LIMIT 10 Read as many relevant file sections as possible. Return a COMPREHENSIVE structured summary covering ALL 21 topics above, with source citations (book title + line numbers). Include any image URLs you find in the content (format: IMAGE_URL: url).