function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Crespo, Luis C & Domenech, Marc & Enguidanos, Alba', 3],
    ['Marusik, Yuri M. & Esyunin, Sergei L. & Tuneva, Tatyana K.', 2],
    ['Milano, Filippo & Mammola, Stefano & Rollard, Christine', 1],
    ['Ponomarev, A. V. & Bragina, T. M. & Shmatko, V. Yu.', 1],
    ['Seropian, Armen & Bulbulashvili, Natalia & Krammer, Hans-Joachim', 2],
    ['Zamani, Alireza & Marusik, Yuri M.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=11)',
    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);