function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Briggs, T. S. & Hom, K.', 1],
    ['Briggs, Thomas S. & Hom, Kevin', 1],
    ['Brignoli, Paolo M.', 1],
    ['Chamberlin, Ralph V.', 1],
    ['Giltay, L.', 1],
    ['Hansen, Hans Jacob', 1],
    ['Hansen, Hans Jacob & Sörensen, William', 7],
    ['Jackson, A. Randell', 1],
    ['Kishida, K.', 1],
    ['Kraus, Otto', 3],
    ['Kraus, Otto & Beck, L.', 1],
    ['McDonald, W. A. & Hogue, C. L.', 1],
    ['Pocock, Reginald Innes', 1],
    ['Roewer, Carl Friedrich', 1],
    ['Rowland, J. Mark', 2],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    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);