Conferences were selected by type of attendees.
For race and ethnicity (see Table 4), attendees could choose more than one option, allowing for inclusivity of attendees' backgrounds.
Since meeting organisers often wish to attract the maximum number of attendees, a less rigorous selection of abstracts may result for larger meetings.
Because of the high number of attendees and the busy nature of the clinic we used convenience sampling, which could have introduced selection bias.
If Trump's conversation with the Taiwanese president caused the Reagan forum attendees to cringe, his selection of Dunford's fellow marine Jim Mattis as defense secretary caused them to exhale.
Houthi representatives made up 6% of attendees.
The list of attendees could grow before Friday.
The youthfulness of attendees similarly plays a role.
A number of attendees said they welcomed the politicians' presence.
"Online, the cost to the attendee and the limit on the number of attendees basically disappears," he says.
