function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Jones, Hugh D. & Mcdonald, Jillian C.', 4],
    ['Jones, Hugh D. & Webster, Bonnie L. & Littlewood, D. Timothy J.', 4],
    ['Mateos, Eduardo & Sluys, Ronald & Riutort, Marta', 7],
    ['Vila-Farré, Miquel & Mateos, Eduardo & Sluys, Ronald', 3],
    ['Vila-Farré, Miquel & Sluys, Ronald & Mateos, Eduardo', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=24)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);