Intranasal use of lavender and fennel decreases salivary cortisol levels and improves quality of sleep: a double-blind randomized clinical trial - Polonini, H; Mesquita, D; Lanine, J; Dijkers, E; Gkinis, S; Raposo, N RB; Brandão, M AF; Ferreira, A DO (Eur J Integr Med, 2020)