function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bellan-Santini, Denise & Dauvin, Jean-Claude', 2],
    ['Kaim-Malka, R. A.', 3],
    ['Kaim-Malka, R. A. & Bellan-Santini, D. & Dauvin, C.', 6],
    ['Kaim-Malka, R. A. & Bellan-Santini, D. & Dauvin, J. C.', 7],
    ['Peart, Rachael A.', 3],
    ['Valério-Berardo, Maria Teresa', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);