function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Caesar, Maram & Roy, Roger & Legendre, Frederic', 1],
    ['Connors, Matthew G.', 1],
    ['Greyvenstein, Bianca & van den Berg, Johnnie', 1],
    ['Roy, Roger & Stiewe, Martin B. D.', 2],
    ['Schwarz, Christian J. & Konopik, Oliver', 4],
    ['Schwarz, Christian J. & Pohl, Marius & Frank, Erik T.', 9],
    ['Unnahachote, T. & Samung, Y. & Waengsothorn, S. & Jaitrong, W.', 3],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);