[hs/Fe], [ls/Fe] and [hs/ls] vs. [Fe/H] are shown in the three panels, from top to bottom, respectively. Dashed line separates stars belonging to the high and the low branches. Data have been collected from the following references: CEMP dwarfs – Lucatello et al. (2003), Sivarani et al. (2004); CEMP subgiants – Aoki et al. (2002b), Cohen et al. (2003), Tsangarides (2005), Cohen et al. (2006), Thompson et al. (2008); CEMP giants – Aoki et al. (2001, 2002b), Barbuy et al. (2005), Masseron et al. (2010); CH subgiants – Luck & Bond (1991), Pereira & Junqueira (2003), Pereira & Drake (2011); CH giants – Vanture (1992b,c), Kipper et al. (1996), Začs et al. (1998), Van Eck et al. (2001), Johnson & Bolte (2004), Goswami et al. (2006), Pereira & Drake (2009), Goswami & Aoki (2010), Masseron et al. (2010); Ba dwarfs – Allen & Barbuy (2006); Ba giants – Allen & Barbuy (2006), Pereira & Drake (2009).