function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Geiger, Daniel L.', 3],
    ['Geiger, Daniel L. & Marshall, Bruce A.', 5],
    ['Geiger, Daniel L. & Marshall, Bruce Anders', 1],
    ['Geiger, Daniel L. & Mclean, James H.', 4],
    ['Helwerda, Renate A. & Wesselingh, Frank P.', 1],
    ['Herbert, David G.', 4],
    ['Muratov, Igor V. & Heyns-Veale, Elodie', 1],
    ['Nolt, Jaya M.', 1],
    ['Simone, Luiz Ricardo L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    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);