“…Several studies have investigated a number of recruitment strategies with mixed success. Recruitment strategies discussed in the literature include advertisements (TV, radio, newspapers, Internet) [14][15][16], posters [14,15], brochures [15], direct mailings [15], health center or provider referrals [6,9,14], recruitment through community agencies [4][5][6]13,17], and snowball techniques [14,18]. There is not, however, a consensus regarding which strategy or strategies are the best.…”