TLR7 and systemic lupus erythematosus: Altered dosage of Tlr7 results in lupus‐like phenotypes in mice, as the Yaa mouse model [189] contains a Y‐linked autoimmune accelerating (Yaa) locus consisting of 16 X‐linked genes, including Tlr7 [190], translocated onto the Y chromosome [189, 190].