function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cockerell, Theodore D. A.', 2],
    ['Douglas, J. W.', 1],
    ['Green, E. Ernest', 1],
    ['Maskell, William Miles', 2],
    ['Newstead, R.', 1],
    ['Nietner, J.', 1],
    ['Signoret, V. A. Le Dr.', 2],
    ['Targioni-Tozzetti, Adolfo', 2],
    ['Williams, Douglas J. & Ben-Dov, Yair', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);