Observed (black) and synthesized (green and blue) spectra shown at the position of three exemplary spectral lines. The synthesis including turbulence and rotational broadening and at the instrumental resolution is shown in green. The synthesis without turbulence and rotational broadening and at the highest resolution for the observational wavelength grid is shown in blue. Left: line considered unblended and included in our study. Middle: line rejected due to a blend seen in the unbroadened synthesis. Right: line rejected due to large discrepancy between the observation and the broadened synthesis.