Exome sequence analysis identifies a homozygous, pathogenic, frameshift variant in the MAN2B1 gene underlying clinical variant of α-mannosidosis oleh Jamil Amjad Hashmi, Jamil Amjad Hashmi, Muhammad Latif, Muhammad Latif, Reham M. Balahmar, Muhammad Zeeshan Ali, Fatima Alfadhli, Muzammil Ahmad Khan, Sulman Basit, Sulman Basit