function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cornalba, Maurizio & Quaranta, Marino & Selis, Marco', 1],
    ['Ebmer, Andreas W. & Ockermüller, Esther & Schwarz, Martin', 1],
    ['Gibbs, Jason & Ascher, John S. & Rightmyer, Molly G.', 2],
    ['Portman, Zachary M. & Gardner, Joel & Lane, Ian G.', 1],
    ['Sheffield, Cory S. & Heron, Jennifer', 2],
    ['Zettel, Herbert & Ockermüller, Esther & Schoder, Sabine', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=8)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);