In 2018, Norifumi Hayashi et al. also found the co-localization of MBL and IgG4 deposits, along with the predominance of MBL deposits in patients with APLA2R- and THSD7A-associated MNs (55% vs. 20%); the latter group were also MN patients, but no positive antigens were identified. Here, MBL2 is linked to Melnick-Needles syndrome.