function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brewer, Steven W. & Stott, Gail L.', 1],
    ['Chen, Feng & He, Hai', 1],
    ['Chen, Ronglian & Zhang, Faqi & Chen, Shilong & Chi, Xiaofeng', 1],
    ['De Kok, Rogier P. J.', 8],
    ['DeFilipps, Robert A. & Krupnick, Gary A.', 4],
    ['Info Flora', 1],
    ['Jarvis, Charlie', 4],
    ['Konrad Lauber & Gerhart Wagner & Andreas Gygax', 1],
    ['Suh, Soo-Jung', 2],
    ['Yang, Zhi & Deng, Chaoyi & Wang, Lulu & Ban, Qiming & Yang, Yong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);