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Reproducible retrieval queries (next run)

Google Scholar / PubMed-oriented queries
1. "Waardenburg-Shah syndrome" EDNRB
2. "Waardenburg-Shah syndrome" EDN3
3. "Waardenburg syndrome type IV" EDNRB
4. "Waardenburg syndrome type IV" EDN3
5. "Shah-Waardenburg syndrome" EDNRB OR EDN3
6. "Waardenburg syndrome" Hirschsprung EDNRB
7. "Waardenburg syndrome" Hirschsprung EDN3
8. "EDNRB mutation" Hirschsprung Waardenburg
9. "EDN3 mutation" Hirschsprung Waardenburg
10. "endothelin receptor type B" Hirschsprung Waardenburg
11. "endothelin 3" Hirschsprung Waardenburg
12. "SOX10" "Waardenburg syndrome type IV"
13. "Waardenburg syndrome type 4" review
14. "EDNRB" "neural crest" melanocyte enteric
15. "EDN3" "neural crest" enteric nervous system
16. site:pubmed.ncbi.nlm.nih.gov EDNRB Waardenburg Hirschsprung
17. site:pubmed.ncbi.nlm.nih.gov EDN3 Waardenburg Hirschsprung
18. PMID EDNRB Hirschsprung Waardenburg
19. PMID EDN3 Hirschsprung Waardenburg
20. PMID "Waardenburg syndrome type IV"

Exact-phrase variants to try
21. "Waardenburg syndrome, type 4"
22. "Waardenburg syndrome type 4A"
23. "Waardenburg syndrome type 4B"
24. "Waardenburg syndrome type 4C"
25. "auditory-pigmentary syndrome" Hirschsprung EDNRB
26. "aganglionic megacolon" Waardenburg EDNRB

Recent-literature filters
27. "Waardenburg syndrome type IV" EDNRB 2023 OR 2024
28. "Waardenburg syndrome type IV" EDN3 2023 OR 2024
29. "Hirschsprung disease" EDNRB review 2023 OR 2024
30. "endothelin receptor B" neural crest review 2023 OR 2024

ClinicalTrials.gov queries
31. Waardenburg syndrome type IV
32. Waardenburg-Shah syndrome
33. EDNRB
34. EDN3
35. Hirschsprung disease AND EDNRB
36. Hirschsprung disease AND EDN3
37. Waardenburg AND Hirschsprung
38. SOX10 AND Hirschsprung

Broader fallback queries
39. Hirschsprung disease genetics endothelin pathway
40. enteric nervous system development endothelin receptor B human
41. melanocyte development endothelin 3 receptor B human
42. syndromic Hirschsprung disease EDNRB EDN3 SOX10
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*Code_block: This artifact provides a reusable set of search queries for Google Scholar, PubMed-oriented search, and ClinicalTrials.gov to help retrieve core EDN3/EDNRB Waardenburg–Shah syndrome sources in a subsequent run. It is useful because prior tool-based retrieval returned no citable contexts.*