 ለየት ያለ ሕክምና ለማግኘት, Schuman and Presser (1996), በተለይም በአመለካከት ጥያቄዎች ላይ Saris and Gallhofer (2014), ይህም አጠቃላይ ነው.
Kuti mupeze chithandizo chapamwamba kwambiri, wonani Schuman and Presser (1996), omwe akuwonekera makamaka pa mafunso okhudza maganizo, ndi Saris and Gallhofer (2014), omwe ali ovomerezeka.