function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brösing, Andreas', 1],
    ['Castro, Peter', 6],
    ['Charbonnier, Sylvain & Garassino, Alessandro & Pasini, Giovanni', 2],
    ['Cleva, Régis & Guinot, Danièle & Albenga, Laurent', 2],
    ['González, José A.', 1],
    ['Guinot, Danièle', 7],
    ['Guinot, Danièle & Quenette, Gwenaël', 3],
    ['Mclay, Colin L.', 8],
    ['Mclay, Colin L. & Ng, Peter K. L.', 16],
    ['Ng, Peter K. L. & Jeng, M. - S.', 1],
    ['Ng, Peter K. L. & Mclay, Colin L', 2],
    ['Poupin, Joseph & Corbari, Laure & Pérez, Thierry', 1],
    ['Published, First', 2],
    ['Van, Barry W. M. & Guinot, Danièle & Corral, José Carmelo', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=55)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);