function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bharathidasan, Veeraiyan & Borisanova, Anastasia O.', 1],
    ['Borisanova, Anastasia & Schepetov, Dimitry', 2],
    ['Borisanova, Anastasia O. & Potanina, Darya M.', 6],
    ['Borisanova, Anastasiya O. & Krylova, Elena M.', 1],
    ['Figueroa, Manuel Tierno De & Sánchez-Tocino, Luis', 1],
    ['Kajihara, Hiroshi & Tomioka, Shinri & Kakui, Keiichi', 1],
    ['Nielsen, Claus', 1],
    ['Papp, J.', 1],
    ['Roldán, Carmen & Villalba, Antonio & Viéitez, José M.', 1],
    ['Varela, Carlos & Figueroa, Manuel Tierno De', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);