function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['ASHER, ROBERT J.', 1],
    ['Cabezudo, Baltasar & Solanas, Federico Casimiro-Soriguer', 1],
    ['Conti, Fabio & Reich, Dieter & Gutermann, Walter', 3],
    ['Hess, Hans Ernst & Landolt, Elias & Hirzel, Rosmarie', 2],
    ['Info Flora', 4],
    ['James H. Honacki & Kenneth E. Kinman & James W. Koeppl', 2],
    ['Jarvis, Charlie', 4],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 2],
    ['Martin, W.', 1],
    ['Negaresh, Kazem', 3],
    ['Rainer Hutterer', 2],
    ['Russell A. Mittermeier & Don E. Wilson', 1],
    ['Wilson, Don E. & Reeder, DeeAnn', 2],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);