How many full siblings did Fatemeh Pahlavi have?

Fatemeh Pahlavi was born in Tehran on 30 October 1928.[1][2] She was the tenth child of Reza Shah and his fourth and last wife, Esmat Dowlatshahi.[3][4] Her mother was from the Qajar dynasty and married Reza Shah in 1923.[5] Fatemeh was the full-sister of Abdul Reza Pahlavi, Ahmad Reza Pahlavi, Mahmoud Reza Pahlavi and Hamid Reza Pahlavi.[6]

4 siblings: Abdul Reza Pahlavi, Ahmad Reza Pahlavi, Mahmoud Reza Pahlavi and Hamid Reza Pahlavi.