function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brösing, Andreas', 1],
    ['GUINOT, DANIÈLE & TAVARES, MARCOS & CASTRO, PETER', 1],
    ['Guinot, Danièle', 6],
    ['Hendrickx, Michel E. & Visauta-Girbau, Eva', 1],
    ['Ng, Peter K. L. & Rahayu, Dwi Listyo', 6],
    ['Rahayu, Dwi Listyo & Ng, Peter K. L.', 34],
    ['Rahayu, Dwi Listyo & Widyastuti, Ernawati', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=56)',
    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);