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- [26] 31ST ANNUAL-MEETING THE SOCIETY OF THORACIC SURGEONS ANNALS OF THORACIC SURGERY, 1995, 59 (05): : 1279 - 1279
- [27] 31st Congress of the German Society for Perinatal Medicine Abstracts ZEITSCHRIFT FUR GEBURTSHILFE UND NEONATOLOGIE, 2023, 227 : E145 - E266
- [30] 31st Congress of the Spanish Society of Family and Community Medicine ATENCION PRIMARIA, 2011, 43 (06): : 277 - 278