function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Anistratenko, V. V. & Furyk, Yu. I. & Anistratenko, O. Yu.', 2],
    ['Ayyub, Misbah & Niazi, Abdul Rehman', 1],
    ['Filippova, Nina & Zvyagina, Elena & Rudykina, Elena', 4],
    ['Frank, Christa', 1],
    ['Girard, Claude', 2],
    ['Gulpercin, N. & Tezcan, S.', 6],
    ['Johnson, Paul J. & Casari, Sônia A.', 1],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 3],
    ['Liu, Hong & Mao, Ning & Fan, Li & Guo, Shang', 1],
    ['Tian, Enjing & Gao, Chonghua & Xie, Xiaomei & Zheng, Yuan', 2],
    ['Zambrano-Forero, Cristian J & Davila-Giraldo, Lina R', 1],
    ['Zhu, Xin-Yu & Nyima, Tenzin & Vizzini, Alfredo & He, Mao-Qiang', 2],
    ['de la Fuente, Javier Isaac & García-Jiménez, Jesús', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);