Primary Source #440:

Balaji G, Kalaivani S. Observance of Kassowitz law-late congenital syphilis: Palatal perforation and saddle nose deformity as presenting features. Indian J Sex Transm Dis AIDS. 2013 Jan;34(1):35-7. doi: 10.4103/0253-7184.112869. PMID: 23919053; PMCID: PMC3730472.

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