Cognitive Impairment after Mild Stroke: Development and Validation of the SIGNAL2 Risk Score Manuscript Number: 15-0736R1 Author(s): Pryseley Nkouibert Assam, Alvin Rae Cenina, Russell Jude Chander, Chin Yee Cheong, Nagaendran Kandiah, Xuling Lin, Aloysius Ng, Yen Yeong Poh