function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arillo, Antonio & Peñalver, Enrique & Delclòs, Xavier', 2],
    ['Borkent, Art', 2],
    ['Borkent, Art & Dominiak, Patrycja & Díaz, Florentina', 1],
    ['El-Hawagry, Magdi S. & El-Azab, Salah El-Din A.', 4],
    ['Guo, Mingxia & Xing, Lida & Wang, Bo & Zhang, Weiwei', 7],
    ['Mazumdar, Abhijit & Saha, Narayan C. & Chaudhuri, Prasanta K.', 4],
    ['Phillips, Robert A.', 19],
    ['Santarém, Maria Clara Alves & Cremer, Marta Jussara', 3],
    ['Spinelli, Gustavo & Wolff, Marta', 3],
    ['Spinelli, Gustavo R. & Ronderos, Maria M. & Díaz, Florentina', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=46)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);