title: Inverting the information matrix in gene-frequency estimation in systems like ABO.
abstract: It is shown that the matrix of second-order derivatives of the log likelihood function in the case of ABO-like systems can be subjected to explicit inversion in the general case of k antigens.
mesh_terms: D000017:ABO Blood-Group System; D005787:Gene Frequency; D013223:Statistics as Topic
chemical_list: D000017:ABO Blood-Group System