function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Connors, Matthew G.', 6],
    ['Greyvenstein, Bianca & van den Berg, Johnnie', 1],
    ['Herhold, Hollister W & Davis, Steven R & Degrey, Samuel P', 1],
    ['M. Beier', 2],
    ['Oshima, Kazuyuki', 1],
    ['Schwarz, Christian J. & Konopik, Oliver', 1],
    ['Schwarz, Christian J. & Pohl, Marius & Frank, Erik T.', 1],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1],
    ['de Saussure, Henri Louis Frédéric', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);