function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ballantyne, L. A.', 4],
    ['Ballantyne, Lesley A. & Lambkin, Christine', 1],
    ['Ballantyne, Lesley A. & Lambkin, Christine L.', 2],
    ['Fu, Xin Hua & Ballantyne, Lesley', 2],
    ['Fu, Xinhua & Ballantyne, Lesley & Lambkin, Christine', 1],
    ['Ho, - Z.', 12],
    ['Nada, B. & Ballantyne, L. A.', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);