1. FINCA, University of Turku , Vesilinnantie 5, 20014 Turku, Finland
2. Subaru Telescope, National Astronomical Observatory of Japan , 650 North Aohoku Place, Hilo, HI-96720, USA
3. Department of Astronomy and Center for Galaxy Evolution Research, Yonsei University , Seoul 03722, Republic of Korea
4. Astrophysics Group, School of Physics, University of Bristol , Tyndall Avenue, Bristol BS8 1TL, UK