function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arroyo, Frank', 2],
    ['Bradford, Jason C.', 4],
    ['Bradford, Jason C. & Miller, James S.', 6],
    ['Clarke, Robin & Zamalloa, Sonia', 1],
    ['Forster, Johann Reinhold & Forster, Johann George Adam', 1],
    ['Fortune Hopkins, Helen C.', 48],
    ['Hoogland, Ruurd Dirk', 4],
    ['Hopkins, Fortune & Bradford, Jason C.', 53],
    ['Hopkins, Lewis Sylvester', 1],
    ['Jarvis, Charlie', 2],
    ['Lorence, David H. & Wagner, Warren L.', 1],
    ['Mattfeld, Johannes', 1],
    ['Perry, Lily May', 4],
    ['Pulle, August Adriaan', 1],
    ['Schlechter, Fridrich Richard Rudolf', 8],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=139)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);