function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Guenther, Rainer & Dahl, Chris & Richards, Stephen J.', 1],
    ['Guenther, Rainer & Richards, Stephen & Tjaturadi, Burhan', 2],
    ['Hoskin, Conrad J.', 4],
    ['Hoskin, Conrad J. & Aland, Kieran', 2],
    ['Kraus, Fred', 9],
    ['Kraus, Fred & Allison, Allen', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    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);