Should be able to specify parent nodes as:
family history unknown (when this option is selected no other parent nodes should be present)
Q: Should we also add mitochondrial donor?
From Bennett et al. (2008). Standardized human pedigree nomenclature: update and assessment of the recommendations of the national society of genetic counselors. J Genet Counsel. 17:424-433.
Bulk action to set priority to 'Medium' for issues with unset priority.