The key to this is accessibility. To ensure their presence, make sure that they are informed about the meetings. You can circulate information or make an employee responsible for informing everyone. Make sure that the materials required for the meeting are made available in different accessible formats. Using both audio and visual aids is a good way of including everyone, usually. Always have reading material or power point presentations, which will be accessible to people with hearing disability. For people with visual disability, soft copies (electronic format) can be circulated in advance or Braille material or audio material can be made available. The room and furniture should be barrier free for wheelchair users.