Open-Label Extension Study of EFC12492, R727-CL-1112, EFC12732 and LTS11717 Studies to Assess the Long-Term Safety and Efficacy of Alirocumab in Patients With Heterozygous Familial Hypercholesterolemia

Primary Objective: To assess the long-term safety of alirocumab (SAR236553/REGN727) when added to lipid-lowering therapy in participants with heterozygous familial hypercholesterolemia (heFH) who had completed EFC12492 (NCT01623115), R727-CL-1112 (NCT01709500), EFC12732 (NCT01617655) and LTS11717 (NCT01507831). Secondary Objectives: * To evaluate the long-term efficacy of alirocumab on lipid parameters. * To evaluate the long-term immunogenicity of alirocumab.