Who are the gym leaders in Pokemon Platinum?

Here are the Gym Leaders in Pokemon Platinum, along with their specialty types:

Sinnoh Region:

1. Gardenia (Eterna City): Grass-type

2. Maylene (Veilstone City): Fighting-type

3. Crasher Wake (Pastoria City): Water-type

4. Fantina (Hearthome City): Ghost-type

5. Byron (Canalave City): Steel-type

6. Candice (Snowpoint City): Ice-type

7. Volkner (Sunyshore City): Electric-type

Note: There are no other Gym Leaders in Pokemon Platinum besides the standard Sinnoh region Gym Leaders.