function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bayartogtokh, Badamdorj & Bae, Yang-Seop', 2],
    ['Beck, L. & Woas, S.', 1],
    ['Behan-Pelletier, Valerie M. & Lindo, Zoë', 5],
    ['Ermilov, S. G. & Anichkin, A. E.', 1],
    ['Franklin, Elizabeth', 1],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 1],
    ['Migliorini, Massimo', 1],
    ['Nakamura, Y. - N. & Fukumori, S. & Fujikawa, T.', 1],
    ['Norton, Roy A. & Ermilov, Sergey G.', 2],
    ['Schatz, Heinrich & Fortini, Lorenzo & Fusco, Tommaso', 2],
    ['Weigmann, G. & Miko, L.', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);