function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Breure, Abraham S. H.', 1],
    ['Breure, Abraham S. H. & Ablett, Jonathan D.', 2],
    ['Cooke, C. Montague', 4],
    ['Foon, Junn Kitt & Clements, Gopalasamy Reuben & Liew, Thor-Seng', 1],
    ['Gould, A. A.', 1],
    ['Green, J.', 2],
    ['Guinea, Michael & Pilsbry, Henry A.', 1],
    ['Jay, J. C.', 1],
    ['Mighels, J. W.', 2],
    ['Muratov, Igor V.', 4],
    ['Neubert, Eike & Damme, Dirk van', 1],
    ['Pease, W. H.', 1],
    ['Pfeiffer, L.', 4],
    ['Phung, Chee-Chean & Yu, Fred Tuh Yit & Liew, Thor-Seng', 1],
    ['Rowson, B & Warren, B. H. & Ngereza, C. F.', 2],
    ['Other (2)', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    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);