function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Ananjeva, Natalia B. & Milto, Konstantin D.', 5],
    ['Chandramouli, S. R.', 1],
    ['Daudin, F. M.', 1],
    ['Delfino, Massimo & Bailon, Salvador & Pitruzzella, Gaetano', 1],
    ['Eskandarzadeh, Naeimeh & Rastegar-Pouyani, Nasrullah', 1],
    ['Ivanov, Martin', 1],
    ['Jablonski, Daniel & Khalili, Faizurrahman & Masroor, Rafaqat', 1],
    ['Kirchhof, Sebastian & Wasonga, Victor & Mazuch, Tomáš', 1],
    ['Ma‛ayan Lev, Dani Nadel, Mina Weinstein-Evron & Reuven Yeshurun', 1],
    ['Szyndlar, Zbigniew & Georgalis, Georgios L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    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);