function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Couvreur, Thomas L. P. & Dagallier, Leo-Paul M. J.', 14],
    ['Couvreur, Thomas L. P. & Niangadouma, Raoul', 1],
    ['Dagallier, Leo-Paul M. J. & Mbago, Frank M. & Couderc, Marie', 27],
    ['Gosline, George & Cheek, Martin & Onana, Jean Michel', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=44)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 4, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);