function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Fend, Steven V.', 1],
    ['Fend, Steven V. & Brinkhurst, Ralph O.', 8],
    ['Fend, Steven V. & Carter, James L.', 4],
    ['Fend, Steven V. & Lenat, David R.', 2],
    ['Kaygorodova, Irina A. & Liventseva, Victoria', 1],
    ['Martin, Patrick & Ferraguti, M. & Kaygorodova, Irina A.', 2],
    ['Šundić, Danijela & Radujković, Branko M.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);