function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gray, John Edward', 2],
    ['Hoser, Raymond', 2],
    ['Iverson, John B.', 13],
    ['Kaiser, Hinrich & Carvalho, Venancio Lopes & Ceballos, Jester', 1],
    ['Lapparent de Broin, France & Molnar, Ralph', 5],
    ['McCord, William P. & Thomson, Scott Andrew Mr.', 1],
    ['Philippen, Hans-Dieter & Grossmann, Peter', 1],
    ['Rhodin, Anders G. J.', 2],
    ['Rhodin, Anders G. J. & Mittermeier, Russell A.', 1],
    ['Shea, Glenn & Thomson, Scott & Georges, Arthur', 5],
    ['Siebenrock, Friedrich', 1],
    ['Smales, Ian', 1],
    ['Thomson, Scott Andrew Mr. & Kennett, Rod', 1],
    ['Yates, Adam Matthew', 1],
    ['de Vis, Charles Walter', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=38)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);