function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Becherer', 115],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 12],
    ['Danylyk, Ivan M. & Koopman, Jacob', 9],
    ['Grabovskaya-Borodina, Alisa E. & Illarionova, Irina D.', 19],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 109],
    ['Howell, Nathan & Krings, Alexander & Braham, Richard R', 8],
    ['Info Flora', 125],
    ['Jarvis, Charlie', 43],
    ['Jimenez-Mejias, Pedro & Morales-Alonso, Ana & Oleas, Nora H', 18],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 100],
    ['Lee, Jong-Won & Yun, Ho-Geun & Hwang, Tae Young & Kim, Kyungmin', 29],
    ['Stöhr, O. & Pilsl, P. & Essl, F. & Hohla, M. & Schröck, C.', 10],
    ['Stöhr, O. & Pilsl, P. & Essl, F. & Wittmann, H. & Hohla, M.', 13],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 18],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 18],
    ['Other (49)', 99]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=745)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);